Factors associated with incomplete childhood immunization in Arbegona district, southern Ethiopia: a case--control study

Determinants of incomplete immunization among 12-23 months old children in Ethiopia: A multilevel analysis

BACKGROUND

Vaccinations saved over 37 million lives between 2000 and 2019. Despite this, Ethiopia's Expanded Program of Immunization has struggled to meet its goals, and little has been studied on the community and individual level determinants of incomplete immunization. Therefore, this study aimed to assess the predictors of incomplete immunization among Ethiopian children aged 12-23 months using Ethiopian Mini Demographic Health Survey 2019 (EMDHS 2019).

METHODS

The study used data from EMDHS 2019 and about 1029 children aged 12-23 months were included in the study. STATA version 17.0 statistical software was used to manage and analyze data. Multilevel binary logistic regression analysis was conducted. An AOR with 95%CI, and P < 0.05 were used to determine strength of association and declare significance level, respectively.

RESULTS

The factors maternal age ranges of 15-24 (AOR: 4.23; 95%CI: 2.17-8.26) and 25-34 (AOR: 2.68; 95%CI: 1.56-4.61), family size ≥5 (AOR: 2.03; 95%CI: 1.24-3.30), ≤3 antenatal care visits (AOR: 2.32; 95%CI: 1.43-3.75), no postnatal care (AOR: 2.20; 95%CI: 1.23-3.95), rural residence (AOR: 2.54; 95%CI: 1.08-6.25), low (AOR=3.55; 95% CI: 1.32-9.55) and moderate (AOR: 3.29; 95% CI: 1.55-7.00) community-level antenatal care services utilization, and low community-level institutional delivery (AOR: 3.93; 95%CI: 1.35-11.50) were the significant determinant factors of incomplete immunization in Ethiopia.

CONCLUSION

Young maternal age, family size, inadequate ANC, rural residence, not utilizing PNC services, and poor wealth status were the individual level determinants of incomplete immunization. Low and moderate level of ANC services utilization, and low community level institutional delivery service utilization were the factors determining incomplete immunization at the community level. Therefore, the health decision makers better to be committed to design strategies to enhance complete immunization coverage and maternal and child health services.

Full vaccination coverage for children aged 12-23 months in Madagascar: Analysis of the 2021 Demographic and Health Survey

BACKGROUND

Vaccination plays a pivotal role in safeguarding the health and wellbeing of children worldwide, preventing the spread of infectious diseases, and reducing mortality rates. Despite significant progress in global immunisation efforts, disparities in vaccination coverage persist in Madagascar. This study examines the factors associated with full vaccination coverage among children aged 12-23 months in Madagascar.

METHODS

We analysed a cross-sectional dataset from the 2021 Madagascar Demographic and Health Survey (MDHS). A total of 2,250 mothers with children aged 12 to 23 months were extracted from the children's dataset. Vaccination coverage was evaluated based on maternal self-report and child vaccination card observations. A weighted multivariable binary logistic regression analysis was used to examine the factors associated with full vaccination coverage. Adjusted odds ratios (aORs) with 95% confidence intervals (CIs) were used to present the results of the factors associated with full vaccination coverage. Stata 13.0 was used to perform all the analyses.

RESULTS

We found that 48.9% of children aged 12-23 months were fully vaccinated. Vaccination coverage for Bacille Calmette-Guérin (BCG), third-dose polio, third-dose of diphtheria-tetanus-pertussis (DPT), and measles was 78.1%, 58.6%, 68.4%, and 63.9%, respectively. Mothers aged 35 to 49 (aOR: 1.69; 95% CI: 1.08-2.64) were more likely to have their children fully vaccinated compared to women aged 15-24. Children born to mothers with secondary or higher education (aOR:1.68; 95% CI:1.15-2.45) were more likely to receive full vaccination than those whose mothers had no formal education. Mothers within the middle-class wealth index (aOR: 1.48; 95% CI: 1.04-2.12) were more likely to have their children fully vaccinated compared to the poorest category. Mothers who were working (aOR: 1.45; 95% CI: 1.06-1.98) had higher odds of full childhood vaccination compared to those who were not working. Compared to mothers who delivered their babies at home or other places, those who delivered their babies at the health facility (aOR:1.57; 95% CI: 1.22-2.02) were more likely to vaccinate their children . Mothers who had less than eight (1-7) antenatal care visits (aOR: 3.63; 95% CI: 2.30-5.72) and those with 8 or more visits (aOR: 1.20; 95% CI: 1.35-6.51) were more likely to have their children vaccinated fully compared to those with zero antenatal care visits. Mothers exposed to media (aOR: 1.65; 95% CI: 1.26-2.16) were more likely to fully vaccinate their children than their unexposed counterparts.

CONCLUSION

Full childhood vaccination coverage is low in Madagascar. Factors identified to be associated with vaccination coverage were maternal age, education, place of delivery, working status, antenatal care visits, and media access. Collaboration between the Ministry of Health and local authorities is recommended in Madagascar to improve vaccination coverage, promote antenatal care, clean delivery practices and access to skilled birth attendants, raise parental awareness, and enhance healthcare workers' communication about vaccination schedules through various media channels.

Regional disparities of full pentavalent vaccine uptake and the determinants in Ethiopia: Mapping and spatial analysis using the EDHS data

BACKGROUND

The full pentavalent (DPT-HepB-Hib) vaccination is the main strategy to prevent five communicable diseases in early childhood, especially in countries with huge communicable disease burdens like Ethiopia. Exploring spatial distributions and determinants of full pentavalent vaccination status in minor ecological areas in Ethiopia is crucial for creating targeted immunization campaigns and monitoring the advancement of accomplishing sustainable development goals. This study aimed to investigate the spatial disparities and determinants of full pentavalent vaccination among 12-23-month-old children in Ethiopia.

METHOD

The data on pentavalent vaccine uptake was found in the Ethiopian Health and Demographic Survey (EDHS, 2019). A two-stage cluster sampling method was applied to collect the EDHS data. The enumeration area was the primary sample unit while the household served as the secondary sampling unit. The geographical variations of full pentavalent vaccine uptake were explored using Quantum Geographic Information System (QGIS) software. The significant predictors of full pentavalent vaccination were identified using a simple logistic regression model through R version 4.1 software.

RESULT

The national full pentavalent vaccine uptake was 59.2%. The spatial distribution of full pentavalent vaccine uptake was not uniform in Ethiopia. Spatial cluster analysis revealed that most of low coverage regions for full pentavalent vaccine uptake were Afar, Somali, and Harari. The regions with the highest and lowest rates of vaccine uptake were Tigray and Harari region, respectively. Maternal age of 35-49 years (AOR = 3.42; 95% CI: 1.99, 5.87), and 25-34 years (AOR = 1.55; 95% CI: 1.17, 2.19), primary education attended (AOR = 1.51; 95%CI: 1.07, 2.11), richness wealth index (AOR = 1.96; 95% CI: 1.40, 2.75), birth order of 1-3 (AOR = 1.88; 95% CI: 1.19, 2.96), and delivery in the health facility (AOR = 3.41: 95% CI: 2.52, 4.61) were the determinants of full pentavalent vaccine uptake in Ethiopia.

CONCLUSION

Ethiopia's full pentavalent vaccine uptake was far lower than the global target. Older maternal age, maternal education, wealth index, birth order, and giving birth in a health facility were the determinants of full pentavalent vaccine uptake. Special attention should be given to Afar, Somali, and Harari regions, to strengthen the vaccine uptake. Moreover, improved socioeconomic status and getting maternal health services during delivery are necessary to enhance vaccine uptake.

Prevalence, spatial variation and determinants of zero-dose children in Ethiopia: Spatial and multilevel analyses

OBJECTIVES

Vaccination is a crucial public health intervention protecting individuals and communities from vaccine-preventable diseases. However, unvaccinated children in low- and middle-income countries pose a significant challenge. Ethiopia, a Global Alliance for Vaccines and Immunisation (GAVI)-supported country, ranks fifth in zero-dose immunisation burden, indicating concerning vaccine coverage gaps. Despite the severity of this issue, there is a dearth of research investigating the disparities, prevalence and contributing factors associated with zero-dose children in Ethiopia. This study aimed to assess the prevalence, spatial distribution and determinants of zero-dose children in Ethiopia.

STUDY DESIGN

A community-based cross-sectional study was conducted using data from the 2019 Ethiopian Mini Demographic and Health Survey (EMDHS). Data were collected from 21 March 2019 to 28 June 2019.

METHODS

The study included a total of 1334 children aged 12-35 months (weighted sample). For spatial and multilevel analyses, ArcGIS 10.8 and Stata 17 software were used, respectively. The measure of association was determined by computing the adjusted odds ratio (AOR) at a 95 % confidence interval (95 % CI), and a p-value <0.05 was considered statistically significant.

RESULTS

The prevalence of zero-dose children in Ethiopia was 46.5 % (95 % CI: 43.8, 49.2). Southeast Amhara, Afar, Somali, Oromia and SNNPR (Southern Nations, Nationalities and Peoples' Region) regions had high zero-dose proportions. Maternal age 15-19 years (AOR = 1.63; 95 % CI: 1.05, 2.64), lack of antenatal care (AOR = 1.77; 95 % CI: 1.34, 2.35), rural residence (AOR = 1.94; 95 % CI: 1.17, 3.19) and region were significantly associated to zero-dose status in Ethiopia.

CONCLUSIONS

The prevalence of zero-dose children in Ethiopia was high and the distribution exhibited significant variation across the country's clusters. Individual and community factors were key contributors. It is essential that areas with a high prevalence of zero-dose children have access to recommended childhood vaccines. This proactive approach can help protect children from morbidity and mortality caused by vaccine-preventable diseases.

Parents' or legal guardians' beliefs and attitudes about childhood vaccination: a scoping review

OBJECTIVE

to map scientific evidence about perceptions, beliefs, knowledge and attitudes of parents or legal guardians of children under 5 years of age regarding routine childhood vaccination.

METHODS

a scoping review, conducted in accordance with the JBI framework. The searches were carried out in the PubMed/MEDLINE, Web of Science, Scopus and LILACS databases. A total of 5,535 studies were returned and 77 were selected, which met the inclusion criteria.

RESULTS

perceptions related to interaction with healthcare professionals and services, with family organization and structure, with social interaction and public policies, cultural, religious and personal beliefs, knowledge about vaccination schedule, vaccination and immunization process and sources of information are the main factors mapped and which can positively or negatively influence parents' or legal guardians' attitudes towards vaccinating children.

CONCLUSIONS

the findings allow us to identify factors related to parents' perception and beliefs about childhood vaccination.

Effect of maternal education on completing childhood vaccination in Ethiopia: systematic review and meta-analysis

This systematic review and meta-analysis aimed to examine the association between maternal education and completion of childhood vaccination among aged 12-23 months children in Ethiopia. Systematic review and meta-analysis. PubMed-Medline, EMBASE, SCOPUS, Global Health, and Google Scholar were searched for articles published from January 2010 to January 2020. The data extraction was reported based on the PRISMA guideline (Preferred Reporting Items for Systematic Reviews and Meta-Analysis) guidelines. We performed the I2 test and a funnel plot to assess heterogeneity and check for publication bias. We assessed 841 studies for eligibility, of which 43 studies were included in the qualitative synthesis, and 28 studies were fully accessed for meta-analysis. The overall pooled effect of this systematic review and meta-analysis demonstrated a positive association between maternal education and completion of childhood vaccination. Having a primary level of maternal education was correlated with a 1.87 times higher likelihood (95% CI 1.76-1.98) of completing childhood vaccination compared to having no education. Furthermore, attending secondary education and above was associated with a 3.47 times higher likelihood (95% CI 3.18-3.78) of completing childhood vaccination compared to having no education. This systematic review and meta-analysis study revealed that as the level of maternal education increases, the completion of childhood vaccination accelerates. Therefore, investment in maternal education should be prioritized as an intervention. Empowering mothers through education can contribute to the reduction and prevention of vaccine-preventable diseases and associated risks.

Characterizing zero-dose and under-vaccinated children among refugees and internally displaced persons in the Democratic Republic of Congo

BACKGROUND

The Democratic Republic of Congo (DRC) has one of the highest numbers of un and under-vaccinated children as well as number of refugees and internally displaced persons (IDPs) in the world. This study aims to determine and compare the proportion and characteristics of zero-dose (ZD) and under-vaccinated (UV) children among refugees and IDPs in the DRC, as well as the reasons for incomplete vaccination schedules.

METHODS

Data from a rolling vaccination coverage survey conducted from September 10, 2022, to July 03, 2023, among refugees and IDPs in 12 provinces of the DRC. ZD was defined as a child aged 12-23 months who had not received any dose of pentavalent vaccine DTP-Hib-Hep B (by card or recall) and UV as a child who had not received the third dose of pentavalent vaccine. The proportions of non and under-vaccination and the associated factors using a logistic regression model are presented for ZD and UV children. The reasons for non-vaccination of these children are described using the WHO-Immunization behavioral and social-drivers-conceptual framework and compared using Pearson's Chi2 test.

RESULTS

Of 692 children aged 12 to 23 months included in the analysis, 9.3% (95% CI: 7.2-11.7%) were ZD and 40.9% (95% CI: 95%: 37.2-44.6%) UV. The Penta1/Penta3 drop-out rate was 34.9%. After adjustment, ZD children had a significant history of home or road birth. And UV children were significantly associated with mothers/caregivers being under 40, uneducated, farmers, ranchers, employed, rural residents, as well as with home or road births. Reasons linked to people's perceptions and feelings were cited much more often for ZD (50.0%) than for UV (38.3%). Those related to social reasons were cited much more often by ZD (40.6%) than by UV (35.7%). Reasons related to "programmatic and practical issues" were cited less for ZD (90.5%) than for UV (97.1%).

CONCLUSIONS

ZD and UV children represent significant proportions in refugee and IDPs sites in the DRC. However, the proportion of ZD is less than for the entire country, while the proportion of UV is comparable, reflected in a very high drop-out rate. Similarly to studies in the general population in DRC, the reasons for ZD children were mainly linked to challenges in caregiver motivation to vaccinate, while for UV children, they were more often linked to pro-grammatic and practical problems of the health system.

Impact of maternal depression and anxiety on immunization status of children: a prospective cohort study

BACKGROUND

Maternal depression and anxiety can have a detrimental impact on birth outcomes and healthy child development; there is limited knowledge on its influence on immunization schedule adherence. Therefore, the objectives of this study were to determine the impact of maternal depression and anxiety in the perinatal period on prolonged vaccine delay of childhood vaccines.

METHODS

In this prospective cohort study, we analyzed linked survey and administrative data of 2,762 pregnant women in Calgary, Alberta, Canada. Data were collected at two time-points: prenatal (< 25 weeks of gestation) and postpartum (4 months postpartum). We used multivariable logistic regression to examine the association between depression and anxiety with prolonged immunization delay, adjusting for covariates.

RESULTS

In multivariable analysis, maternal depression at either time point was not associated with prolonged delay for DTaP-IPV-Hib (OR 1.16, 95% CI 0.74-1.82), MMR/MMRV (OR 1.03, 95% CI 0.72-1.48), or all routine childhood vaccines combined (OR 1.32, 95% CI 0.86-2.04). Maternal anxiety at either time point was also not associated with prolonged delayed for DTaP-IPV-Hib (OR 1.08, 95% CI 0.77-1.53), MMR/MMRV (OR 1.07, 95% CI 0.82-1.40), or all vaccines combined (OR 1.00, 95% CI 0.80-1.26). In both the depression and anxiety models, children of Canadian-born mothers had higher odds of prolonged delay, as did those with low-income mothers.

CONCLUSION

Health care providers can be reassured that maternal depression and anxiety do not appear to influence maternal commitment to routine immunization. Findings suggested that low income and household moves may influence adherence to vaccine schedules and health care providers may want to provide anticipatory guidance to these families.

Mapping geographical inequalities of incomplete immunization in Ethiopia: a spatial with multilevel analysis

Background

Immunization is one of the most cost-effective interventions, averting 3.5-5 million deaths every year worldwide. However, incomplete immunization remains a major public health concern, particularly in Ethiopia. The objective of this study is to investigate the geographical inequalities and determinants of incomplete immunization in Ethiopia.

Methods

A secondary analysis of the mini-Ethiopian Demographic Health Survey (EDHS 2019) was performed, utilizing a weighted sample of 3,865 children aged 12-23 months. A spatial auto-correlation (Global Moran's I) statistic was computed using ArcGIS version 10.7.1 to assess the geographical distribution of incomplete immunization. Hot-spot (areas with a high proportion of incomplete immunization), and cold spot areas were identified through Getis-Ord Gi* hot spot analysis. Additionally, a Bernoulli probability-based spatial scan statistics was conducted in SaTScan version 9.6 software to determine purely statistically significant clusters of incomplete immunization. Finally, a multilevel fixed-effects logistic regression model was employed to identify factors determining the status of incomplete immunization.

Results

Overall, in Ethiopia, more than half (54%, 95% CI: 48-58%) of children aged 12-23 months were not fully immunized. The spatial analysis revealed that the distribution of incomplete immunization was highly clustered in certain areas of Ethiopia (Z-score value = 8.379419, p-value < 0.001). Hotspot areas of incomplete immunization were observed in the Afar, Somali, and southwestern parts of Ethiopia. The SaTScan spatial analysis detected a total of 55 statistically significant clusters of incomplete immunization, with the primary SaTScan cluster found in the Afar region (zones 1, 3, and 4), and the most likely secondary clusters detected in Jarar, Doola, Korahe, Shabelle, Nogob, and Afdar administrative zones of the Somali region of Ethiopia. Indeed, in the multilevel mixed-effect logistic regression analysis, the respondent's age (AOR: 0.92; 95% CI: 0.86-0.98), residence (AOR: 3.11, 95% CI: 1.36-7.14), living in a pastoralist region (AOR: 3.41; 95% CI: 1.29-9.00), educational status (AOR: 0.26; 95% CI: 0.08-0.88), place of delivery (AOR: 2.44; 95% CI: 1.15-5.16), and having PNC utilization status (AOR: 2.70; 95% CI: 1.4-5.29) were identified as significant predictors of incomplete immunization.

Conclusion and recommendation

In Ethiopia, incomplete immunization is not randomly distributed. Various factors at both individual and community levels significantly influence childhood immunization status in the country. It is crucial to reduce disparities in socio-demographic status through enhanced collaboration across multiple sectors and by bolstering the utilization of maternal health care services. This requires concerted efforts from stakeholders.

Prediction of incomplete immunization among under-five children in East Africa from recent demographic and health surveys: a machine learning approach

The World Health Organization as part of the goal of universal vaccination coverage by 2030 for all individuals. The global under-five mortality rate declined from 59% in 1990 to 38% in 2019, due to high immunization coverage. Despite the significant improvements in immunization coverage, about 20 million children were either unvaccinated or had incomplete immunization, making them more susceptible to mortality and morbidity. This study aimed to identify predictors of incomplete vaccination among children under-5 years in East Africa. An analysis of secondary data from six east African countries using Demographic and Health Survey dataset from 2016 to the recent 2021 was performed. A total weighted sample of 27,806 children aged (12-35) months was included in this study. Data were extracted using STATA version 17 statistical software and imported to a Jupyter notebook for further analysis. A supervised machine learning algorithm was implemented using different classification models. All analysis and calculations were performed using Python 3 programming language in Jupyter Notebook using imblearn, sklearn, XGBoost, and shap packages. XGBoost classifier demonstrated the best performance with accuracy (79.01%), recall (89.88%), F1-score (81.10%), precision (73.89%), and AUC 86%. Predictors of incomplete immunization are identified using XGBoost models with help of Shapely additive eXplanation. This study revealed that the number of living children during birth, antenatal care follow-up, maternal age, place of delivery, birth order, preceding birth interval and mothers' occupation were the top predicting factors of incomplete immunization. Thus, family planning programs should prioritize the number of living children during birth and the preceding birth interval by enhancing maternal education. In conclusion promoting institutional delivery and increasing the number of antenatal care follow-ups by more than fourfold is encouraged.

Determinants of second-dose measles vaccination dropout in Ethiopia: A community-based matched case-control study

Background

Measles vaccination is the most important public health intervention and a cost-effective strategy to reduce morbidity and mortality in under-five children. Although Ethiopia's government developed a measles elimination strategic plan by 2020, the full coverage of immunization was 43 %. Therefore, this study aimed to identify determinants of second-dose measles vaccination (MCV2) dropout among children aged 24-35 months in East Bale Zone, Ethiopia.

Method

A community-based matched case-control study was conducted among 351 children (117 cases and 234 controls). Children who received the first dose of measles vaccine but did not receive the second dose were cases, and children who received both doses of measles vaccine were control. The matches were based on age and residence. The data were collected using a structured questionnaire, entered into Epi Data 3.1, cleaned, exported, and analyzed using Stata version 16.1. A multivariable conditional logistic regression analysis was performed. Variables with a P value of <0.05 were considered significant determinants of the dependent variable at the 95 % confidence level.

Results

Mothers who were unable to read and write (mAOR: 4.0; 95 % CI: 1.59-10.2), did not receive counseling (mAOR: 3.19; 95 % CI: 1.62-6.27), spent ≥30 min to reach health facilities (mAOR; 2.76, 95 % CI: 1.25-6.1), and did not attend postnatal care (mAOR; 3.46, 95 % CI: 1.58-7.57) were significantly and positively associated with second-dose measles vaccination dropout. In addition, mothers who had poor knowledge of second-dose measles vaccination (mAOR; 3.20, 95 % CI: 1.50-6.70) and waited more than an hour for measles vaccination at health facilities (mAOR; 2.61, 95 % CI: 1.0-6.20) were significantly more likely to experience second-dose measles vaccine dropout.

Conclusions

The key factors associated with second-dose measles vaccination dropout are maternal illiteracy, lack of PNC, inadequate maternal knowledge and poor counseling about MCV2 vaccination, long distances travel to healthcare facilities and extended waiting times at vaccination providing sites. Health extension workers emphasize strengthening home visit programs in catchment households to improve mothers' awareness of measles vaccination.

Immunization coverage and its associated factors among children aged 12-23 months in Ethiopia: An umbrella review of systematic review and meta-analysis studies

BACKGROUND

Immunization estimated to prevent 2 to 3 million children deaths every year from vaccine preventable disease. In Ethiopia, limited and inconclusive studies have been conducted on immunization coverage so far. Therefore, this umbrella review was intended to estimate the pooled national immunization coverage and its associated factors among children age 12-23 months in Ethiopia.

METHODS

This umbrella review included five systematic reviews and meta-analyses through literature search from PubMed, Science direct, and web of science, CINHALE, and data bases specific to systematic reviews such as the Cochrane Database of Systematic Reviews and Prospero, the International Prospective Register of Systematic Reviews from May 1 to 30/ 2023. Only systematic reviews and meta-analyses published in English from inception to May 1, 2023, were included. The quality of each study was assessed using Assessment of Multiple Systematic Reviews. Data were extracted using Microsoft excel 2016 and analyzed using STATA 17.0 statistical software. Heterogeneity among studies was assessed using the Cochran Q statistics and I2 test. The pooled effect sizes were determined using pooled proportion for the full vaccination coverage and odds ratios for the associated factors with the corresponding 95% confidence interval were used to declare statically significance.

RESULTS

Five studies with 77,161 children aged 12-23 months were included. The overall pooled full vaccination coverage was 57.72% (95% CI 50.17, 65.28). Institutional delivery (OR: 2.12, 95% CI: 1.78-2.52), travel to vaccination site for <2 hours (OR: 2.43, 95%CI: 1.97-3.00), received at least one antenatal (ANC) visit (OR: 3.2, 95%CI: 2.46-4.1), good maternal knowledge of immunization (OR: 3.63, 95%CI: 2.82-4.67), being informed on immunization schedule (OR: 2.54, 95%CI: 2.02-3.2), living in urban areas (OR: 2, 95% CI: 1.54-2.6), and a household visit by health-care providers (HCP) during the postnatal period (OR: 2.23, 95%CI: 1.22-4.09) were the independent predictors of immunization coverage.

CONCLUSION

This study showed the full immunization coverage in Ethiopia was lower compared to the WHO-recommended level. Besides, the current umbrella review identifies several factors that contribute to higher immunization coverage. These includes; institutional delivery, near to vaccination site, having ANC visit, being urban residence, household visited by HCP, having good knowledge and informed on immunization schedule. Thus, the government should intensify the growth of immunization services by emphasizing outreach initiatives to reach remote areas and professionals must combine child immunization service with other medical services offered by health institutions.

Individual and community-level determinants of pentavalent vaccination dropouts among under-five children in the sub-Saharan African countries: A multilevel analysis of the recent demographic and health survey

Background

Globally, each year, about 3 million deaths among children are prevented by pentavalent vaccinations. However, in developing countries, particularly in Sub-Saharan Africa, pentavalent vaccination dropout rates are not well reported. Therefore, this study aimed to assess pentavalent vaccination dropout rates and their determinants among under-five children in Sub-Saharan Africa.

Methods

Data from the recent Demographic and Health Surveys in 33 Sub-Saharan African countries were used for analysis. The study used a total of 358,529 under-five children. The determinants of pentavalent vaccination dropout were determined using a multilevel mixed-effects logistic regression model. Significant factors associated with pentavalent vaccination dropout were declared significant at p-values < 0.05. A model with the lowest deviance and highest logliklihood ratio was selected as the best-fit model.

Results

In Sub-Saharan Africa, one in five under-five children had pentavalent vaccination dropout rates. Factors such as Age (AOR = 1.61, 95 % CI: 1.51, 1.72), educational level (AOR = 1.30, 95 % CI: 1.22, 1.40), place of delivery (AOR = 1.65, 95 % CI: 1.57, 1.73), ANC visits (AOR = 1.34, 95 % CI: 1.23, 1.45), postnatal check-up (AOR = 1.19, 95 % CI: 1.14, 1.25), wealth status (AOR = 1.09, 95 % CI: 1.04, 1.15), distance to health facility (AOR = 1.08, 95 % CI: 1.03, 1.13), media exposure (AOR = 1.12, 95 % 1.15), and geographical region (AOR = 1.60, 95 % CI: 1.49, 1.72) had higher odds of pentavalent vaccination dropouts.

Conclusions

Pentavalent vaccination dropout rates in sub-Saharan Africa among under-five children were high. Both individual and community-level variables were determinants of pentavalent vaccination dropout rates. Government and ministry of health in Sub-Saharan Africa should give attention to those mothers of under-five children who reported distance as a big problem in accessing health facilities and to women who do not utilise antenatal and postnatal check-ups while designing policies and strategies in sub-Saharan Africa.

Health system barriers to the first dose of measles immunization in Ethiopia: a qualitative study

BACKGROUND

Ethiopia has made considerable progress toward measles elimination. Despite ongoing efforts, the country remains among those with the highest number of children missing their initial dose of measles vaccine, and the disease continues to be a public health emergency. The barriers within the health system that hinder the first dose of measles immunization have not been thoroughly investigated. This study aims to identify these barriers within the Ethiopian context.

METHODS

Qualitative research, using purposive expert sampling to select key informants from health organizations in Addis Ababa, Ethiopia was employed. We conducted in-depth face-to-face interviews using a semi-structured interview guide. A thematic analysis based on the World Health Organization's health systems building blocks framework was conducted.

RESULTS

The study uncovered substantial health system barriers to the uptake of the first dose of the measles vaccine in Ethiopia. These barriers include; restricted availability of immunization services, vaccine stockouts, shortage of cold chain technologies, data inaccuracy resulting from deliberate data falsification or accidental manipulation of data, as well as data incompleteness.

CONCLUSION

Our research highlighted significant health system barriers to MCV1 immunization, contributing to unmet EPI targets in Ethiopia. Our results suggest that to accelerate the country towards measles elimination, there is an urgent need to improve the health systems components such as service delivery, information systems, as well as access to vaccine and cold chain technologies.

High prevalence of zero-dose children in underserved and special setting populations in Ethiopia using a generalize estimating equation and concentration index analysis

BACKGROUND

Globally, according to the World Health Organization (WHO) 2023 report, more than 14.3 million children in low- and middle-income countries, primarily in Africa and South-East Asia, are not receiving any vaccinations. Ethiopia is one of the top ten countries contributing to the global number of zero-dose children.

OBJECTIVE

To estimate the prevalence of zero-dose children and associated factors in underserved populations of Ethiopia.

METHODS

A cross-sectional vaccine coverage survey was conducted in June 2022. The study participants were mothers of children aged 12-35 months. Data were collected using the CommCare application system and later analysed using Stata version 17. Vaccination coverage was estimated using a weighted analysis approach. A generalized estimating equation model was fitted to determine the predictors of zero-dose children. An adjusted odds ratio (AOR) with 95% confidence interval (CI) and a p-value of 0.05 or less was considered statistically significant.

RESULTS

The overall prevalence of zero-dose children in the study settings was 33.7% (95% CI: 34.9%, 75.7%). Developing and pastoralist regions, internally displaced peoples, newly formed regions, and conflict-affected areas had the highest prevalence of zero-dose children. Wealth index (poorest [AOR = 2.78; 95% CI: 1.70, 4.53], poorer [AOR = 1.96; 95% CI: 1.02, 3.77]), single marital status [AOR = 2.4; 95% CI: 1.7, 3.3], and maternal age (15-24 years) [AOR = 1.2; 95% CI: 1.1, 1.3] were identified as key determinant factors of zero-dose children in the study settings. Additional factors included fewer than four Antenatal care visits (ANC) [AOR = 1.3; 95% CI: 1.2, 1.4], not receiving Postnatal Care (PNC) services [AOR = 2.1; 95% CI: 1.5, 3.0], unavailability of health facilities within the village [AOR = 3.7; 95% CI: 2.6, 5.4], women-headed household [AOR = 1.3; 95% CI:1.02, 1.7], low gender empowerment [AOR = 1.6; 95% CI: 1.3, 2.1], and medium gender empowerment [AOR = 1.7; 95% CI: 1.2, 2.5].

CONCLUSION

In the study settings, the prevalence of zero-dose children is very high. Poor economic status, disempowerment of women, being unmarried, young maternal age, and underutilizing antenatal or post-natal services are the important predictors. Therefore, it is recommended to target tailored integrated and context-specific service delivery approach. Moreover, extend immunization sessions opening hours during the evening/weekend in the city administrations to meet parents' needs.

Factors affecting on compliance of childhood immunization in Ilam District of Nepal; A case-control study

Childhood immunization is one of the most important public health interventions to reduce child morbidity and mortality. Reaching all children with full immunization services is critical to meet Nepal's commitment to Sustainable Development Goals (SDGs). This study aimed to identify factors affecting compliance with childhood immunization in children aged 16 to 36 months in Nepal. A community-based unmatched case-control study was conducted with 250 (83 cases and 167 controls) respondents in the Ilam district of Nepal. Respondents were randomly selected using a multi-stage cluster sampling technique. Data were collected using a structured questionnaire and analysed using SPSS version 16 statistical software. Bivariate and multivariate logistic regression analyses were done to identify the factors influencing compliance with childhood immunization of the sampled respondents. More than two-thirds (66.8%) of the sampled children were fully immunized, and 19.3% of the children defaulted to the Measles-Rubella vaccines. Only 19.2% of the respondents had good knowledge about the type of vaccine, and more than half (59.2%) of the respondents had a positive attitude towards immunization. Multivariate logistic regression analysis revealed that lack of knowledge about vaccines (AOR = 49.4, 95% CI = 12.94 to 188.59), father's level of education (AOR = 2.1, 95% CI = 1.05 to 4.30), not getting immunization on the day of the appointment (AOR = 4.8, 95% CI = 2.30 to 9.89), lack of knowledge about immunization schedule (AOR = 2.4, 95% CI = 1.14 to 4.84), and negative attitude towards immunization (AOR = 2.1, 95% CI = 1.03 to 4.19) were independently impeded on compliance on the childhood immunization. Targeted intervention in health promotion activities at the household level should be promoted and integrated immunization services into the existing primary health care services.

Machine learning algorithms' application to predict childhood vaccination among children aged 12-23 months in Ethiopia: Evidence 2016 Ethiopian Demographic and Health Survey dataset

INTRODUCTION

Childhood vaccination is a cost-effective public health intervention to reduce child mortality and morbidity. But, vaccination coverage remains low, and previous similar studies have not focused on machine learning algorithms to predict childhood vaccination. Therefore, knowledge extraction, association rule formulation, and discovering insights from hidden patterns in vaccination data are limited. Therefore, this study aimed to predict childhood vaccination among children aged 12-23 months using the best machine learning algorithm.

METHODS

A cross-sectional study design with a two-stage sampling technique was used. A total of 1617 samples of living children aged 12-23 months were used from the 2016 Ethiopian Demographic and Health Survey dataset. The data was pre-processed, and 70% and 30% of the observations were used for training, and evaluating the model, respectively. Eight machine learning algorithms were included for consideration of model building and comparison. All the included algorithms were evaluated using confusion matrix elements. The synthetic minority oversampling technique was used for imbalanced data management. Informational gain value was used to select important attributes to predict childhood vaccination. The If/ then logical association was used to generate rules based on relationships among attributes, and Weka version 3.8.6 software was used to perform all the prediction analyses.

RESULTS

PART was the first best machine learning algorithm to predict childhood vaccination with 95.53% accuracy. J48, multilayer perceptron, and random forest models were the consecutively best machine learning algorithms to predict childhood vaccination with 89.24%, 87.20%, and 82.37% accuracy, respectively. ANC visits, institutional delivery, health facility visits, higher education, and being rich were the top five attributes to predict childhood vaccination. A total of seven rules were generated that could jointly determine the magnitude of childhood vaccination. Of these, if wealth status = 3 (Rich), adequate ANC visits = 1 (yes), and residency = 2 (Urban), then the probability of childhood vaccination would be 86.73%.

CONCLUSIONS

The PART, J48, multilayer perceptron, and random forest algorithms were important algorithms for predicting childhood vaccination. The findings would provide insight into childhood vaccination and serve as a framework for further studies. Strengthening mothers' ANC visits, institutional delivery, improving maternal education, and creating income opportunities for mothers could be important interventions to enhance childhood vaccination.

Effect of COVID-19 on Routine Childhood Vaccination in Bahir Dar City, Northwestern, Ethiopia

Despite free vaccinations for all children, Ethiopia is one of the ten countries where most children do not receive all of their basic vaccines. The COVID-19 pandemic has disrupted service delivery and utilization worldwide. In this study, we assessed the effect of the pandemic on routine childhood vaccinations in Bahir Dar, Ethiopia. The data were collected from immunization records, health system monthly reports, and interviews with vaccination professionals. The data were analyzed using interrupted time series and thematic analyses. In 6940 records covering 2018-2022, the number of vaccine doses that were delivered steadily increased except for 2021/22. Vaccine delivery consistently increased prior to the pandemic. Immediately after the first case was reported, there were some disruptions, but they were not statistically significant compared to the pre-pandemic period. In-depth interviews also confirmed this finding, showing early pandemic fear and protective measures had an impact but were not sustained. These results show that COVID-19 has had a transient but non-significant effect on childhood vaccination. Although the interruption was statistically insignificant, it could reverse decades of progress toward safeguarding children from vaccine-preventable diseases. Therefore, we must intensify our initiatives to boost childhood vaccination rates and restore pre-pandemic services to regain momentum and avoid future setbacks.

Predictors of timeliness of vaccination among children of age 12-23 months in Boricha district, Sidama region Ethiopia, in 2019

BACKGROUND

Traditional measurement of vaccine coverage can mask the magnitude of timely uptake of vaccine. Hence, the optimal measurement of timeliness is unclear due to variations in vaccine schedule among countries in the world. In Ethiopia, Oral Polio Virus (OPV), Pentavalent, Tetanus, H. influenza type B, Hepatitis B, and Pneumonia-Conjugate Vaccine (PCV) are basic vaccines which are taken at birth, six weeks, ten weeks, and fourteen weeks respectively. Despite its importance, information is scarce about on-time vaccination in the study area. Therefore, this study aimed to assess prevalence and factors associated with on-time vaccination among children of age 12-23 months in Boricha district, Sidama Ethiopia, in 2019.

METHODS

A community based survey was conducted in Boricha district, Sidama region Ethiopia from January 1-30 in 2019. Study participants were selected using stratified multistage sampling technique. Kebeles were stratified based on residence. First, Kebeles were selected using random sampling. Then, systematic random sampling was employed to reach each household. Data were collected using structured and interviewer administered questionnaire. Logistic regression analysis was employed to identify factors associated with timely vaccination. Then, independent variables with p-value < 0.25 in COR were fitted further into multivariate logistic regression analysis model to control the possible cofounders. AOR with 95% CI and p-value < 0.05 was computed and reported as the level of statistical significance.

RESULTS

From a total of 614 study participants, only 609 study participants have responded to questions completely making a response rate of 99.2%. Prevalence of timeliness of vaccination was 26.8% (95% CI: 25, 28) in this study. Factors like children of women with formal education (AOR = 5.3, 95%CI,2.7, 10.4), absence of antenatal care visit (AOR = 4.2,95%CI, 1.8,9.8), home delivery (AOR = 6.2,95%CI,4.0,9.3), lack of postnatal care (AOR = 3.7,95%CI,1.1,13.3), and lack of information about when vaccines completion date (AOR = 2.0, 95% CI,1.13,3.8) were factors influences timely vaccination among children of age 12-23 months.

CONCLUSION

Prevalence of on-time vaccination among children of age 12-23 months is lower than national threshold. Therefore, sustained health education on vaccination schedule and reminder strategies should be designed and implemented. Furthermore, maternal and child health care services should be enhanced and coordinated to improve on-time uptake of vaccine.

Determinants of incomplete child vaccination among mothers of children aged 12-23 months in Worebabo district, Ethiopia: Unmatched case-control study

In nations like Ethiopia, vaccination rates are low despite being one of the most effective public health treatments to protect infants from common infectious diseases that can be prevented by immunization. In Worebabo District, the reasons of the underutilization of vaccination programs are poorly understood. Therefore, this study aimed to identify determinants of incomplete childhood vaccination in the study setting. Community based unmatched case-control study was carried out among 441 mothers of children aged 12-23 months old (147 cases and 294 controls) in Worebabo District, Ethiopia from March 1-April 30, 2020. Using a multistage sampling process, mothers were chosen. Health professionals were trained to collect data using a pre-tested standardized questionnaire. Data entered into Epi Info version 7.2 and put through statistical analysis in SPSS version 23. Binary logistic regression was performed to determine the odds ratio with a 95%CL. A p-value of under 0.05 was estimated statistically significant. The study found that older moms (>35 years old) were more likely than younger mothers to fail to properly immunize their children (AOR = 2.4, 95% CI: 1.09, 5.28). In addition, mothers with incomplete vaccinations had lower knowledge of the benefits of vaccination (AOR = 2.02, 95% CI: 1.20, 3.39), Negative attitudes towards immunization (AOR = 4.9, 95% CI: 2.82, 8.49), less access to prenatal care (AOR = 3.68, 95% CI: 1.58, 8.54), home delivery (AOR = 5.47, 95% CI: 2.58)., 11.58), absent home visits (AOR = 3.56, 95% CI: 1.69, 7.48), and longer time to reach vaccination site (>1 h) (AOR = 10.07)., 95% CI: 1.75, 57.79) were found associated with mother incomplete vaccination of the child. Mothers being older age, less access to antenatal care services, place of home delivery, longer time to reach vaccination site, negative attitude and poor knowledge towards the benefit of vaccination were associated with mothers' incomplete vaccination of the child. Therefore, health professionals should inform and counsel mothers about the advantages of childhood immunization as well as the consequences of incomplete or not vaccination of children at the time of the facility visit and by community health workers during the routine home visit.

Solving teenage and young mothers' childhood immunization hesitance and non-compliance through mobile immunization friendly service for working mothers in Ibadan, Nigeria- A research note

Mobile Immunization for working mothers (SheVaccs) is an intervention targeted at working mothers in the informal markets of Ibadan to address problem of vaccine hesitance and drop-out among different categories of mother. These mothers have great responsibilities-keeping their homes stable and their children healthy. But these mothers have challenges of different magnitudes that prevented them from immunizing their children, and for teenage mothers they are faced with socio-cultural and socio-economic obstacles and have not responded positively to childhood immunization. In relation to these challenges, SheVaccs intervention study provided friendly immunization, counselling services, and information around vaccination schedules to working mothers in Ibadan, Nigeria. The intervention covered adolescent and young mothers' population in the selected markets. Mobile clinic was set up in 3 different purposively selected markets in Ibadan. Data were collected through qualitative methods of observation and 21 in-depth interviews with teenage mothers, and 6 key informant interviews with their significant others. All data were subjected to content analysis. The age range of mothers involved in the study was between 17-23 years, almost all participants had no post- secondary school education. All mothers in this study find it difficult to attend conventional immunization centers, due to stigmatization, subtle hostility and embarrassment they experienced during pregnancy and after in some of these centers. Many of them were ignorant and have also been mis-socialized into motherhood and childcare. They preferred an immunization service that is mobile, with "strangers" who are friendly, understanding and will not judge them for ''being anti-social". Friendly Mobile immunization services targeted at teenage and young mothers will remove clog of stigmatization and hostility and minimize incidence of childhood Immunization Hesitance and non-compliance to schedule.

Prevalence and factors associated with incomplete immunization among children aged 12 to 35 months in Eswatini: analysis of the Eswatini multiple indicator cluster survey

Introduction

incomplete childhood immunization is a significant public health challenge as children continue to succumb to vaccine-preventable diseases in most developing countries. Studies on childhood immunization conducted in Eswatini are sparse. Therefore, the present study assessed the prevalence of incomplete childhood immunization in Eswatini and further explored associated factors among children aged 12 to 35 months.

Methods

using data from Eswatini multiple indicator cluster survey 5 (EMICS5), a cross-sectional analysis with 978 children aged 12 to 35 months was conducted. This is the latest available data in the public domain. The survey was conducted from July 2014 to October 2014. The primary outcome variable was incomplete immunization. Univariate and multivariate logistic regressions were used to examine the association between selected variables and incomplete immunization.

Results

the mean age of the children was 23.45±6.92 months, 50.2% were boys, and 74.1% lived in rural areas. The prevalence of incomplete immunization was 31.5%. Increased child´s age, being a girl, increased caregiver´s age, and increased number of children under-five years in the household and residing in the Manzini or Hhohho region were significantly associated with incomplete immunization.

Conclusion

the EMICS 5 revealed a high prevalence of incomplete immunization in Eswatini. Health promotion activities such as empowering women and caregivers of children through health education about child health should be emphasized. Where feasible, outreach services and door-to-door immunization should be strengthened to improve immunization coverage in the country and cover dropouts.

Determinants of defaulter to full vaccination among children aged 12-23 months in Siraro district, West Arsi zone, Oromia, Ethiopia: a case-control study

BACKGROUND

Vaccination is one of the most cost-effective global public health interventions to reduce childhood morbidity and mortality. Defaulters to full vaccination can put children at greater risk of acquiring vaccine-preventable disease outbreaks. The reason for not receiving full vaccination is not well explored, and hence, there is limited evidence about defaulters of vaccination in Ethiopia.

OBJECTIVES

To identify determinants of defaulter to full vaccination among children aged 12-23 months in Siraro District, West Arsi Zone, Oromia Region, Ethiopia.

METHODS

A community-based unmatched case-control study was conducted among children aged 12-23 months from March 20 to April 30, 2022, with a total sample size of 444 (148 cases and 296 controls). Cases were children aged 12-23 months who had missed at least one routine vaccination dose, while controls were children who had received all of the recommended routine vaccinations. Consecutive sampling and simple random sampling techniques were used to select representative cases and controls respectively. Data were collected using a structured questionnaire, entered into Epi-data version 4.6, and exported to Statistical Package for Social Sciences version 26 for analysis. Logistic regression was used to identify determinants of the defaulter to full vaccination and the variables with p-value < 0.25 were recruited for multivariable analysis, and an adjusted odds ratio with a 95% confidence interval and a p-value of ≤ 0.05 was used to declare the statistical significance of the association.

RESULT

Of the assessed determinants of the defaulter to full vaccination; inadequate knowledge of mothers/caretakers (AOR = 4.32, 95% CI:2.78-6.70), educational status of a father unable to read and write (AOR = 3.66, 95% CI:1.29-10.39), time to reach health facility ≥ 30 minutes (AOR = 2.45, 95% CI:1.51-3.97), not told about the type of vaccine received (AOR = 2.37, 95% CI;1.27-4.45), no parents discussion on vaccination (AOR = 2.16, 95% CI:1.24-3.79), home delivery (AOR = 2.43, 95% CI:1.39-4.25) and not participated in pregnant mother conference (AOR = 2.47, 95% CI = 1.35-4.49) were the identified determinants of the defaulter to full vaccination.

CONCLUSION

Mother's' knowledge, father's education, place of delivery, time to reach a health facility, health workers who told the type of vaccine received, participation in pregnant mother conference, and parents' discussion on vaccination were the determinants of the defaulter to full vaccination status. Thus, the district health office should work on defaulters of vaccination by strengthening immunization service delivery and improving maternal knowledge on vaccination through pregnant mother conference participation.

Incomplete immunization and its determinants among children in Africa: Systematic review and meta-analysis

Immunization is one of the most cost-effective measures to prevent morbidity and mortality in children. Therefore, the purpose of this systematic review and meta-analysis was to determine the pooled prevalence of incomplete immunization among children in Africa as well as its determinants. PubMed, Google Scholar, Scopus, Science Direct, and online institutional repository homes were searched. Studies published within English language, with full text available for searching, and studies conducted in Africa were included in this meta-analysis. A pooled prevalence, Sub-group analysis, sensitivity analysis and meta-regression were conducted. Out of 1305 studies assessed, 26 met our criteria and were included in this study. The pooled prevalence of incomplete immunization was 35.5% (95% CI: 24.4, 42.7), I² = 92.1%). Home birth (AOR=2.7; 95% CI: 1.5-4.9), rural residence (AOR = 4.6; 95% CI: 1.1-20.1), lack of antenatal care visit (AOR = 2.6; 95% CI: 1.4-5.1), lack of knowledge of immunizations (AOR=2.4; 95% CI: 1.3-4.6), and maternal illiteracy (AOR = 1.7: 95%CI: 1.3-2.0) were associated with incomplete immunization. In Africa, the prevalence of incomplete immunization is high. It is important to promote urban residency, knowledge of immunization and antenatal follow up care.

"Zero Dose" Children in the Democratic Republic of the Congo: How Many and Who Are They?

(1) Background: The Democratic Republic of the Congo (DRC) is one of the countries with the highest number of never vaccinated or "zero-dose" (ZD) children in the world. This study was conducted to examine the proportion of ZD children and associated factors in the DRC. (2) Methods: Child and household data from a provincial-level vaccination coverage survey conducted between November 2021-February 2021 and 2022 were used. ZD was defined as a child aged 12 to 23 months who had not received any dose of pentavalent (diphtheria-tetanus-pertussis-Haemophilus influenzae type b (Hib)-Hepatitis B) vaccine (by card or recall). The proportion of ZD children was calculated and associated factors were explored using logistic regression, taking into account the complex sampling approach. (3) Results: The study included 51,054 children. The proportion of ZD children was 19.1% (95%CI: 19.0-19.2%); ZD ranged from 62.4% in Tshopo to 2.4% in Haut Lomami. After adjustment, being ZD was associated with low level of maternal education and having a young mother/guardian (aged ≤ 19 years); religious affiliation (willful failure to disclose religious affiliation as the highest associated factor compared to being Catholic, followed by Muslims, revival/independent church, Kimbanguist, Protestant); proxies for wealth such as not having a telephone or a radio; having to pay for a vaccination card or for another immunization-related service; not being able to name any vaccine-preventable disease. A child's lack of civil registration was also associated with being ZD. (4) Conclusions: In 2021, one in five children aged 12-23 months in DRC had never been vaccinated. The factors associated with being a ZD child suggest inequalities in vaccination that must be further explored to better target appropriate interventions.

Exploring spatial variations and the individual and contextual factors of uptake of measles-containing second dose vaccine among children aged 24 to 35 months in Ethiopia

BACKGROUND

To eliminate measles, which is a devastating contagious disease, Ethiopia introduced the measles-containing second dose vaccine (MCV2) that will be given in the second year of life. Despite its paramount benefit, the coverage was low worldwide and, in Ethiopia, there is scarce evidence on the geographic variations and factors associated with uptake of MCV2.

OBJECTIVE

This study aimed to explore the spatial variations and the individual and contextual factors of uptake of measles-containing second dose vaccine among children aged 24 to 35 months in Ethiopia.

METHODS

We used the 2019 Ethiopian Mini Demographic and Health Survey data. A total weighted sample of 800 children aged 24 to 35 months was used. Multilevel analysis was employed and an adjusted odds ratio (AOR) with a 95% confidence interval (CI) was reported. Factors with a p-value<0.05 in the multivariable analysis were declared to be significant predictors of MCV2 uptake. To explore the spatial variations of MCV2 uptake, we have conducted spatial analysis using both Arc GIS version 10.7 and SaTScan version 9.6 software.

RESULTS

The proportion of MCV2 uptake was 9.84% (95% CI: 7.96%, 12.11%). Children whose mothers were aged 20-34 years (AOR = 0.19; 95%CI: 0.05, 0.69) and 35-49 years (AOR = 0.21; 95%CI: 0.04, 0.90), being the 4th-5th child (AOR = 4.02; 95%CI: 1.45, 11.14) and 6th and above child (AOR = 4.12; 95%CI: 1.42, 13.05) and children who did not receive full childhood vaccinations (AOR = 0.44; 95%CI: 0.25, 0.77) were significantly associated with MCV2 uptake. Besides, MCV2 uptake was clustered in Ethiopia (Global Moran's I = 0.074, p-value <0.01). The primary cluster spatial window was detected in the Benishangul-Gumuz region with LLR = 10.05 and p = 0.011.

CONCLUSION

The uptake of MCV2 in Ethiopia was low. Maternal age, birth order, and uptake of the other basic vaccines were associated with MCV2 uptake. Besides, MCV2 uptake was clustered in Ethiopia and the primary cluster spatial window was located in the Benishangul-Gumuz region. Therefore, special concern should be given to regions with lower MCV2 uptake such as the Benishangul-Gumuz region. Besides, it is better to give attention to basic vaccination programs.

Missed opportunities for immunization among children 0 to 11 months of age that were attended to at debre tabor comprehensive specialized hospital, south gondar zone, Ethiopia

Background

The World Health Organization's Expanded Immunization Program was established in 1974 and aimed to provide vaccines to children all over the world. Since the inception of this program, numerous initiatives and campaigns have been launched, and millions of children around the world have been saved from death. Many vaccine-preventable diseases, however, remain prevalent in developing countries. This is because most of those countries have low immunization coverage for an unknown number of reasons. As a result, the goal of this study was to examine missed opportunities for immunization among children aged 0 to 11 months.

Methods

A cross-sectional survey was carried out from May to August 2022. A structured questionnaire was used to collect data, and the sample was chosen using a simple random sampling technique. Before being entered into the Epidata and exported to the Statistical Package for Social Science for analysis, the data were checked for consistency and completeness. The statistical significance was determined using binary and multiple logistic regression analyses. The statistical level of significance was established at p ≤ 0.05.

Result

In this study, 49.1% of immunization opportunities were missed. Education status [AOR = 2.45, 95% CI = 2.14, 4.22], rural residence [AOR = 4.32, 95% CI = 3.11, 6.38], and perception of caretakers [AOR = 2.13, 95% CI = 1.89, 4.07] were associated with the missed opportunity of immunization.

Conclusion

When compared to previous studies, the proportion of missed immunization opportunities was high in this study. The healthcare staff should be applying the multi-dose vial policy, which is recommended by the World Health Organization to increase the services. The doses for BCG and measles should be minimized to lower doses per vial in order to conduct immunization without having to wait for enough children and without worrying about vaccine waste. All infants who visit the hospital should be linked to immunization services.

Exploring barriers of childhood full vaccination among children living in Siraro District, West Arsi Zone, Oromia region, Ethiopia: A qualitative study

Background

Childhood immunization is one of the most effective global public health interventions to reduce childhood morbidity and mortality. However, some children remain not fully vaccinated in developing countries due to defaulting from full vaccination, which can put them at risk of acquiring vaccine-preventable disease outbreaks. The barriers to full vaccination were well explored in Ethiopia using a qualitative approach. The study aimed to explore barriers to full childhood vaccination in Siraro District, West Arsi Zone, Oromia, Ethiopia.

Methods

A qualitative study was conducted in Siraro District through 15 key informant health workers interviews and 6 in-depth interviews with children's mothers from April 20 to May 15, 2022. Data were collected by semi-structured questionnaires and captured using audio tape recorders and field note-taking. A heterogeneous purposive sampling technique was used to select representative study participants. Data transcription and translation were done according to the respondents' verbatim from the local language to English. Data coding and key categories were identified and analyzed using thematic analysis. Finally, data were presented in narrative forms using respondents' own words as an illustration.

Result

Twenty-one study participants were interviewed and included in this study. Of the explored barriers to full childhood vaccination, the evidence from the respondents was integrated from subcategories and presented as a whole within each thematic area. Five thematic areas emerged from interviews of the participants through thematic analysis of the data. The identified barriers were forgetting the next vaccination schedule, migration of parents, work overload, lack of knowledge and awareness, rumors, and misinformation. Additionally, vaccination service delivery-related barriers such as vaccine vials not being opened for a few children, fear of vaccine side effects, closed health posts during visits by mothers for vaccination, and absence of health extension workers at health posts were the key barriers to full childhood vaccination.

Conclusion

Forgetting vaccination schedule, migration of parents, work overload, rumors, and misinformation, fear of vaccine side effects, vaccine vial not opened for few children, closed health posts during visiting by mothers, absence of health extension workers from health posts were the key barriers to the full vaccination status of children. Thus, the district health office should work on barriers to full vaccination by strengthening vaccination service delivery and improving vaccination awareness through a health extension program.

Theory-based immunisation health education intervention in improving child immunisation uptake among antenatal mothers attending federal medical centre in Nigeria: A study protocol for a randomized controlled trial

BACKGROUND

Childhood immunisation coverage is very low in Nigeria (31%) with Zamfara State being amongst the states with the poorest coverage (<10%). Lack of maternal knowledge, attitude, outcome expectations, self-efficacy, cultural beliefs and assumptions of religious regulations of antenatal mothers towards childhood immunisation are the contributory factors to poor childhood immunisation uptake. This study aims is to develop, implement and evaluate the effects of an immunisation health educational intervention with application of Social Cognitive Theory on pregnant women to improve knowledge, attitude, outcome expectations, self-efficacy, cultural beliefs and assumptions on religious regulations regarding childhood immunization uptake in Federal Medical Centre Gusau, Zamfara State, Nigeria.

METHODOLOGY

The study will be a single-blind parallel-group randomised controlled trial, where baseline data will be collected from 392 estimated antenatal mothers, after that they will be evenly randomised using randomly generated permuted block sizes (each containing two intervention and two control assignments). The study participants will be antenatal mothers of ages 18 years and above who are in third trimesters and attending Federal Medical Centre Gusau, Zamfara State, Nigeria; during the study period and fulfilled all the inclusion and exclusion criteria. The intervention group will undergo five-health education sessions on immunisation, which will be strictly guided by Social Cognitive Theory-based intervention module: while the control group will receive usual care (standard care). Follow-up data will be collected using the same questionnaire at 6-weeks post-delivery, 10-weeks post-delivery and 14-weeks post-delivery. The generalized linear mixed model will be carried-out to determine the overall effect of the intervention after controlling for 14 potential confounding variables. An intention to treat analysis will also be carried-out. Childhood immunisation uptake is the primary outcome while the secondary outcomes are: improved knowledge scores, attitude scores, outcomes expectation, self-efficacy scores, cultural beliefs scores and assumptions on religious regulations scores.

DISCUSSION

The study will be a randomised controlled trial, that focuses on the effects of an immunisation health educational intervention with application of Social Cognitive Theory on pregnant women to improve knowledge, attitude, outcome expectations, self-efficacy, cultural beliefs and assumptions on religious regulations regarding childhood immunisation uptake in Federal Medical Centre Gusau, Zamfara State, Nigeria.

TRIAL REGISTRATION

Pan African Clinical Trial Registry PACTR202006722055635. Protocol registered on 09 June 2020.

Disparities in full immunization coverage among urban and rural children aged 12-23 months in southwest Ethiopia: A comparative cross-sectional study

Vaccination coverage worldwide fell from 86% in 2019 to 83% in 2020. The purpose of this research was to determine the level of full immunization coverage among children aged 12 to 23 months in both urban and rural Southwest Ethiopia. A comparative cross-sectional study of sampled 644 children aged 12 to 23 months was conducted in the community (296 from urban areas and 348 from rural areas). Chi-square testing was used to determine whether there was a significant difference in full immunization coverage between urban and rural children, and binary logistic regression was used to identify predictors of full immunization. This study included 635 caregivers of children aged 12-23 months (292 from urban areas and 343 from rural areas), yielding a 98.4% response rate. The overall, full immunization coverage among the whole children was 66.1%. There was a significant difference in fully immunization coverage between urban 74.3% and rural 59.2% of children (χ2 = 16.126, P = .000). Residence, wealth index, ANC follow up and fear of COVID 19 infection at health institutions were predictor variables for overall full vaccination. Knowledge and place of delivery were predictor variables for full vaccination in the urban area whereas distance and male partner involvement in the rural area. Vaccination coverage was higher in urban compared to rural areas but it is still far below the WHO recommended target. Promoting male involvement, health education, and communication are crucial for alleviating poor knowledge about child immunization.

Delayed vaccination the children up to 2 years of age

OBJECTIVE

To analyze factors associated with vaccination delay in children up to 2 years of age.

METHODS

Cross-sectional study with primary data from a probabilistic sample of 388 children born in 2015. The data were described using absolute and relative frequencies. For the analysis of factors associated with vaccination delay, Cox proportional risk regression was performed, considering the time from birth to the first vaccination delay as a dependent variable and as sociodemographic, economic, behavioral aspects related to health services as independent variables.

RESULTS

The delayed vaccination rate was 88.66%. Variables associated with delayed vaccination were: mother's health problems during delivery or in the first 7 days (HR: 0.68; 95% CI: 0.48-0.96); hospitalization of the child in the first 2 years of life (HR: 1.52; 95% CI: 1.10-2.11); mother's poor bond with health professionals at the health unit (HR: 1.75; 95% CI: 1.01-3.03); purposeful decision to delay or not to vaccinate the child (HR: 1.56; 95% CI: 1.14-2.13).

CONCLUSIONS

The factors associated with health care, such as the mother's health problems, the child's hospitalization in the first 2 years of life, and the bond between the mother and the health professionals affect the timeliness of vaccine doses.

Perceptions of childhood vaccination practices among beneficiaries and healthcare service providers in slums under the national immunization program of India: a qualitative study

Purpose

A qualitative study can help in understanding the unpolluted perspectives of key stakeholders involved in the vaccination practices and can explore vital factors that could influence vaccination-related behaviors and their utilization. This study aims to document the perceptions of caretakers, community members and healthcare service providers related to childhood vaccination practices in slums under the national immunization program (NIP) of India.

Design/methodology/approach

This was a qualitative community-based cross-sectional study. Focus group discussions with caretakers, community members and healthcare service providers were used to build a holistic, detailed description and analysis of the factors associated with childhood vaccination practices within its real-world context.

Findings

Lack of awareness, fear of adverse events following immunization, inappropriate timing of vaccination sessions, loss of daily earnings, migration, lack of good behavior of health staffs, shortage of logistics and vaccines, limited resources and infrastructures and high expectations of beneficiaries were some of the vital barriers impacting vaccination practices in slums.

Research limitations/implications

Though this study provides significant good information on the indicators that can be considered to improve the vaccination practices in any slum settings, it has is also a limitations too due to its setting. Therefore, one needs to be cautious while generalizing these results to other settings like rural. In addition, Though we believe that these strategies could be useful in any setting, it is also important to tailor these observations them as per the need of the society and the population. Also, this is a self-reported qualitative study and therefore the perspectives reported in this study need to be taken with caution. Further, low vaccination, poor awareness, compromised healthcare services, high expectations could be considered as a stigma/fear among the responders and therefore there is always a chance of underreporting. Thus, it would be important in future to conduct a study involving a broader group of people in society and to establish factors associated with the vaccination coverage. that can help in improvement of vaccination.

Originality/value

Initiatives such as regular interactions at different levels, effective communication including reminders, behavior interventions, the continued supply of vaccines and logistics, additional resources for the vaccination program, incentives and recognition, extended sessions and people-friendly healthcare delivery system could be helpful to strengthen the routine vaccination practices in slums.

Partial vaccination and associated factors among children aged 12-23 months in eastern Ethiopia

BACKGROUND

Vaccine prevents about 2-3 million deaths from vaccine-preventable diseases each year. However, immunization coverage in Ethiopia is lower than the herd immunity level required to prevent the spread of all vaccine-preventable diseases. Thus, this study aimed to assess the partial immunization and associated factors among 12-23-month-old children in Eastern Ethiopia.

METHOD

A community-based cross-sectional study design was carried out among 874 randomly selected mothers/caregivers of children aged 12-23 months. A structured questionnaire was adapted and data were collected through face-to-face interviews and review of vaccination cards. Data were coded and analyzed using the Stata version 14 software. A binary logistic regression model was utilized to identify the determinant factors. The predictor of partial immunization was presented by an adjusted odds ratio with a 95% confidence interval. A p-value of < 0.05 was used to establish statistical significance.

RESULT

The prevalence of partial immunization was 31.4% (95% CI: 28-35). The dropout rate between the first and third pentavalent vaccine was 17%. Being female child [AOR = 0.73, 95% CI: 0.52-0.95], 18-20 month child [AOR = 1.6, 95% CI: 1.1- 2.4], the child born to mothers who heard about vaccination [AOR = 3.9, 95%CI: 1.92- 8.01], a child born to mother who did not receive immunization counselling [AOR = 1.65, 95%CI: 1.15-2.36], and child whose mother walk 15-30 min, 31-60 min, and > 60 min to reach nearby health facilities [AOR = 1.94, 95% CI: 1.1-3.45], [AOR = 4.5, 95% CI: 2.47-8.15], and [AOR = 3.45, 95% CI: 1.59- 7.48] respectively were factors significantly associated with partial vaccination.

CONCLUSIONS

The prevalence of partial immunization is high compared to other studies. As a result, to decrease the proportion of defaulters and to increase immunization coverage, maternal health care utilization like antenatal care follow-up and mother knowledge about the importance of the vaccine need to be sought cautiously.

Determinants of measles vaccination dropout among 12 − 23 months aged children in pastoralist community of Afar, Ethiopia

Background

Measles is a viral disease and a leading vaccine-preventable childhood killer. More than 95% of measles deaths occur in countries with low incomes and weak health infrastructures. In response to this, Ethiopia prepared a measles elimination strategic plan to achieve by 2020. However, based on the Mini-Ethiopian demographic health survey 2019 the full coverage of immunization is 43% at the country level and it is lowest (20%) in the Afar region where this study was conducted. Therefore, this study aimed to identify the determinants of the measles vaccine dropout rate in Afar regional state which is one of the pastoralist communities in Ethiopia.

Methods

Community based unmatched case-control study design was used. The study was conducted in Awash district of Afar regional state, Ethiopia from June 1st -30th 2018. Data were collected from a study unit of 12–23 months old children. For this study, a sample of 166 cases and 331controls were selected by simple random sampling methods and the total sample size was 497. Data were collected using a pretested structured questionnaire by health workers using the local language. Data were entered into Epi-info − 7 and analyzed by SPSS version 20 software and logistic regression was used to assess the determinants measles dropout rate.

Results

A total of 487 children participated in this study with a response rate of 97.9%. More than half of the children were female (53.3%) and 113 (35.2%) children mothers’ were not attended formal education. Mother who had antenatal care ≤ 2 visits [AOR:=5.7(3.2–10.14)], being in the birth order of 1 − 3 [AOR = 4.47(1.63–12.29)], long waiting time > 60 min at nearby health facility for vaccine [AOR = 2.37(1.36–4.15)], households visit by health extension workers [AOR = 2.03(1.12–3.66)], pregnant women not participating with women development army [AOR = 3.5(1.94–6.18)], and poor maternal knowledge on vaccination [AOR = 3.30(1.9–5.73)] were significant determinants with measles vaccination dropout rate.

Conclusions

Health facility and mother characteristics were the determinants of the measles vaccine dropout rate. Therefore, tracing and strict follow up by the health extension works using home visits and women development army at the pastoralist community is necessary to reach them.

Full vaccination coverage and associated factors among children aged 12 to 23 months in remote rural area of Demba Gofa District, Southern Ethiopia

Background

Full vaccination refers to the administration of vaccines/antigens recommended for children in the first year of life. However, little is known about full vaccination in remote, rural Ethiopia. This study aimed to measure full vaccination coverage and associated factors among children aged 12 to 23 months in Demba Gofa District, Southern Ethiopia.

Methods

A community-based cross-sectional study was conducted in April and May 2019 using a multistage sampling technique to select 677 mothers with children 12-23 months of age. Data was collected using a pre-tested structured questionnaire, and data were edited, coded, entered, and cleaned using Epi Info v3.1 and analyzed using SPSS v20. Bivariate and multivariable logistic regression was used to understand associations between dependent and independent variables.

Results

Three-hundred and nine children (47.0%) were fully vaccinated, 274 (41.7%) were partially vaccinated, and 74 (11.3%) were not vaccinated at all. Children were more likely to be vaccinated if decisions were made jointly with husbands (AOR = 1.88, 95% CI [1.06-3.34]), were made by mothers (AOR = 4.03, 95% CI [1.66-9.78]), followed postnatal care (AOR = 5.02, 95% CI [2.28-11.05]), if the child's age for completing vaccination was known (AOR = 2.54, 95% CI [1.04-6.23]), and if vaccinations did not make the child sick (AOR = 0.32, 95% CI [0.16-0.64]).

Conclusion

Full vaccination coverage was less than average in the study district and far below the governmental target (90%) necessary for sustained control of vaccine-preventable diseases. Interventions targeted towards maternal healthcare decision-making, postnatal care, knowledge on vaccination timing, and importance should be prioritized to improve full vaccination coverage. A continuous supply of vaccination cards needs to be ensured to improve vaccination conditions.

Bayesian Analysis of Predictors of Incomplete Vaccination against Polio among Children Aged 12-23 Months in Ethiopia

Background: The re-introduction of polio among children aged 12–23 months is likely to occur in Ethiopia due to the low vaccination rates against poliovirus. The study sought to examine the predictors of incomplete vaccination against polio among children aged 12–23 months in Ethiopia. Methods: The data used were obtained from the 2016 Ethiopia Demographic and Health Survey. Binary and Bayesian logistic regressions were used for the data analysis, with parameters estimated using classical maximum likelihood and the Bayesian estimation method. Results: The results revealed that 43.7% of the children were not fully vaccinated against polio in Ethiopia. Maternal age, educational level, household wealth index, exposure to mass media, place of residence, presence of nearby healthy facility, counseling on vaccination, and place of delivery were significant determinants of incomplete polio vaccination among children aged between 12 and 23 months in Ethiopia. Conclusion: Considerable numbers of children are not fully vaccinated against polio in Ethiopia. Individual and contextual factors significantly contributed to incomplete polio vaccination among children in the country. Therefore, the government and other stakeholders should pay particular attention to maternal education to increase mothers’ educational level in all regions and give training and counseling in all urban and rural parts of the country on child vaccination to overcome the problem of children’s incomplete polio vaccination and/or vaccination dropout.

Childhood vaccination uptake and associated factors among children 12-23 months in rural settings of the Gambia: a community-based cross-sectional study

Background

Globally, immunization prevents 2–3 million deaths annually from vaccine-preventable diseases such as diphtheria, tetanus, pertussis, influenza, and measles. In developing countries, several immunization programs have made progress, but the coverage remains a standstill in some areas. In order to inform policies and practices, the present study aimed at assessing vaccination uptake and contextual-associated factors among children aged 12–23 months in rural Gambia.

Methods

A community-based triangulated cross-sectional design was conducted in January 2020, with 200 caregivers with children aged 12–23 months in selected households in rural communities across Upper River Region of the Gambia using multistage sampling technique were recruited. A structured interview questionnaire was developed and Infant Welfare Cards were assessed to elicit information regarding contextual household characteristics towards childhood immunization uptake. Percentages, chi-square/fisher exact test for variables with p-value ≤0.15 were considered for inclusion into logistic regression model. The significance level was set at p < 0.05. The adjusted Odds Ratio (aOR) with 95% Confidence Interval (CI) were reported to declare significance.

Results

The proportion of children who received all the required vaccines was 66%. At the level of antigen-specific coverage, about 88.5% received BCG, 71% received OPV 3, 82.5% received Penta 3, while 72 and 71% received Measles-Rubella and yellow fever, respectively. Caregivers who had primary education level 88.8% (aOR = 0.112; 95% CI = 0.029–0.434), secondary & above 87.2% (aOR = 0.128; 95% CI = 0.029, 0. 561) and arabic/madrassa 95.7% (aOR = 0.043; 95% CI = 0.008–1.227) were less likely to be fully vaccinated when compared to those who have never been to school. Farmers are less likely by 88.9% (aOR = 0.111; 95% CI 0.020, 0.635) while children from family size of more than 20 members had reduced odds (aOR = 0.420; 95% CI = 0.197, 0.894) for their children to complete their vaccination schedule as compared to those with at most 20 household members.

Conclusion

There is moderately a burden of incomplete vaccination in rural Gambia. Vaccination programs should be constantly monitored and evaluated by the Ministry of Health, especially in rural areas. To increase societal awareness and vaccine acceptance, a robust community-based health education efforts are desperately needed as part of initiatives to increase vaccine service utilization for these high-risk classes.

Predictors of Partial Immunization Among Children Aged 12-23 Months in Yirga Cheffe District, South Ethiopia - A Community-Based Unmatched Case-Control Study

Background

Universal age-specific immunization is one of the areas where preventive public health policy has become successful. Despite the increase in global immunization coverage, however, many children around the world, especially in developing countries, are still left unvaccinated. The study aimed at assessing the determinants of partial immunization among children 12–23 months of age in Yirga Cheffe, Gedeo, Ethiopia.

Methodology

A community-based unmatched case-control study design was conducted. Using a simple random sampling technique, 328 samples (164 cases and 164 controls) were selected. Index case was defined as a child aged 12 to 23 months who missed at least one dose of vaccine from the scheduled dose. The odds ratio (OR) and 95% confidence interval (CI) were used to calculate the association, and the level of significance was set at p 0.05.

The Result

The study showed that 40% of children were fully vaccinated, and the prevalence of those with partial vaccination was 46%. The likelihood of having incomplete vaccination was 45% higher in children whose mothers had no antenatal coverage (ANC) visit during pregnancy [OR=0.55, (95% CI; 0.297, 1.035)]. Lack of knowledge about the schedule of the vaccination has negatively affected the success of full vaccination (OR=2.3; 95% CI=1.01, 5.56).

Conclusion

The study revealed that significant numbers of children are not fully vaccinated. Despite appreciable efforts by the Federal Ministry of Health to improve complete immunization coverage, there are still bottlenecks that need to be tackled in enhancing coverage. We recommend the expansion of ANC and providing education on vaccination schedule and importance to minimize the burden of partial vaccinations and its sequelae.

Factors influencing childhood immunisation uptake in Africa: a systematic review

Background

Vaccine preventable diseases are still the most common cause of childhood mortality, with an estimated 3 million deaths every year, mainly in Africa and Asia. An estimate of 29% deaths among children aged 1–59 months were due to vaccine preventable diseases. Despite the benefits of childhood immunisation, routine vaccination coverage for all recommended Expanded Programme on Immunization vaccines has remained poor in some African countries, such as Nigeria (31%), Ethiopia (43%), Uganda (55%) and Ghana (57%). The aim of this study is to collate evidence on the factors that influence childhood immunisation uptake in Africa, as well as to provide evidence for future researchers in developing, implementing and evaluating intervention among African populations which will improve childhood immunisation uptake.

Methods

We conducted a systematic review of articles on the factors influencing under-five childhood immunisation uptake in Africa. This was achieved by using various keywords and searching multiple databases (Medline, PubMed, CINAHL and Psychology & Behavioral Sciences Collection) dating back from inception to 2020.

Results

Out of 18,708 recorded citations retrieved, 10,396 titles were filtered and 324 titles remained. These 324 abstracts were screened leading to 51 included studies. Statistically significant factors found to influence childhood immunisation uptake were classified into modifiable and non-modifiable factors and were further categorised into different groups based on relevance. The modifiable factors include obstetric factors, maternal knowledge, maternal attitude, self-efficacy and maternal outcome expectation, whereas non-modifiable factors were sociodemographic factors of parent and child, logistic and administration factors.

Conclusion

Different factors were found to influence under-five childhood immunisation uptake among parents in Africa. Immunisation health education intervention among pregnant women, focusing on the significant findings from this systematic review, would hopefully improve childhood immunisation uptake in African countries with poor coverage rates.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12889-021-11466-5.

Vaccination services and incomplete vaccine coverage for children: a comparative spatial analysis of the BRISA cohorts, São Luís (Maranhão State) and Ribeirão Preto (São Paulo State), Brazil

We analyzed the spatial relation between incomplete vaccine coverage for children and the distance from vaccination services. This was a cross-sectional study of children from 13 to 35 months of age from the cities of São Luís (Maranhão State) and Ribeirão Preto (São Paulo State), Brazil, and from basic health units (UBS, in Portuguese). The sample consisted of 2,744 children from São Luís and 3,325 from Ribeirão Preto. Data about incomplete vaccine coverage for children were obtained from the BRISA birth cohorts. Data about the quality of UBS vaccination services were obtained from the first cycle of the Brazilian National Program for Improvement of Access and Quality of Basic Care (PMAQ-AB, in Portuguese). For the spatial analysis, we determined the distance between the residence of the children (with and without a complete vaccine calendar) and the vaccination services of the UBS (classified according to number of structural items). Incomplete vaccine coverage was more pronounced in São Luís, with greater percentages for human rotavirus and triple viral vaccines, with the latter being the least available. In Ribeirão Preto, incomplete BCG vaccine coverage was more pronounced, with the tetravalent vaccine being the least available. Children from the two cities showed similarities: most of them had adult mothers with 9 to 11 years of schooling and did not reside with siblings in the household. They also showed differences: in São Luís, most mothers belonged to the economic class C, while in Ribeirão Preto they belong to the A and B classes. In the two cities with different socioeconomic conditions, complete vaccine coverage seemed not to depend on the location or quality of the vaccination service. Although São Luís showed a better structure of the services, incomplete vaccine coverage was higher compared to Ribeirão Preto.

Determinants of Incomplete Vaccination Among Children Aged 12 to 23 Months in Gindhir District, Southeastern Ethiopia: Unmatched Case-Control Study

Background

Incomplete vaccination can put children at greater risk of acquiring vaccine-preventable diseases. In Ethiopia, vaccination coverage against vaccine-preventable diseases is still a significant and persistent public health challenge. Thus, the aim of this study was to identify the determinants of incomplete childhood vaccination among children aged 12-23 months in Gindhir District, Southeast Ethiopia.

Methods

A community-based unmatched case-control design was employed among children aged 12-23 months from 1 to 28 February 2020. A total of 254 cases and 508 controls were included using the stratified random sampling technique. Cases included children aged 12-23 months who missed at least one dose of the routine vaccination, and controls were the children with complete vaccination with all required doses. Binary logistic regression analyses were used to identify the independent factors for children's incomplete vaccination status.

Results

Of all assessed determinants, maternal knowledge about vaccination (AOR=0.50, 95% CI: 0.31, 0.80), educational status (AOR=2.61, 95% CI: 1.19, 5.67), average monthly income (AOR=0.33, 95% CI: 0.15, 0.77), model family (AOR = 2.50, 95% CI: 1.51, 4.14), taking TT vaccine (AOR= 0.45 95% CI: 0.29, 0.78), number of under five children (AOR= 4.90 95% CI: 1.72, 13.93) and birth order (AOR= 6.33, 95% CI: 1.89, 14.87) were found to have statistically significant association with childhood incomplete vaccination.

Conclusion

In this study, the mother's education, model family, birth order, average monthly income, and knowledge were some of the independent determinants of incomplete childhood vaccination. Improving maternal knowledge, income, and educational status should be the expectable measure to reduce incomplete vaccination.

Rural Vaccination Coverage Among Children Aged 12-23 Months Was Higher Than the Urban Counterparts: A Comparative Cross-Sectional Study in Pawi District, Ethiopia

Background

In developing countries like Ethiopia, about 3 million children's deaths are attributed to vaccine-preventable diseases. Studies especially that try to explain the urban to rural vaccination coverage discrepancy are limited in the study area. This study aimed to assess full vaccination coverage and associated factors among children aged 12-23 months in rural and urban kebeles of Pawi district.

Methods

A community-based comparative cross-sectional study among urban and rural kebeles was conducted. A multistage sampling method was used to select 456 rural and 229 urban. Data were collected from mothers/caregivers using interviewer-administered questionnaires and vaccination cards. Full vaccination coverage was estimated for both urban and rural kebeles. Multivariable logistic regression analysis was used to identify factors associated with full vaccination. Adjusted Odds Ratio with a 95% confidence interval was reported.

Results

Full vaccination coverage was 67% (95% CI 63% -71%) and 60% (95% CI: 54% -66%) among rural and urban residents, respectively. Educational status of the father (AOR=2.69; 95% CI, 1.61-4.48), using postnatal care (PNC) (AOR=2.60; 95% CI, 1.58-4.29), discussion on side effect and contraindications of vaccines (AOR=1.82 95% CI, 1.16-2.88), and Institutional delivery (AOR=4.39, 95% CI 2.17-8.87) were factors significantly associated with full vaccination among rural children, whereas using Knowledge on immunization schedules (AOR=1.92 95% CI, 1.03-3.60), PNC (AOR=3.19; 95% CI, 1.57-6.47), discussion on side effects and contraindications of vaccines (AOR=2.75; 95% CI, 1.4-5.3) were notably associated with full vaccination among urban children.

Conclusion

The study reveals vaccination coverage was higher in rural compared to urban kebeles but it is still far below the WHO recommended target. Therefore interventions shall be made to improve the coverage especially by using the identified factors like improving PNC service and promoting institutional delivery and health education.

The use of a speaking book® to enhance vaccine knowledge among caregivers in The Gambia: A study using qualitative and quantitative methods

OBJECTIVES

To measure the usefulness of a Speaking Book (SB) as an educational tool for enhancing knowledge, understanding and recall of key vaccine-related information among caregivers in The Gambia, as well as its acceptability and relevance as a health promotion tool for caregivers and healthcare workers.

DESIGN AND SETTING

We developed a multimedia educational tool, the vaccine Speaking Book, which contained prerecorded information about vaccines provided in The Gambia's Expanded Programme on Immunization. Using qualitative and quantitative methods, we then conducted a sequential study assessing the use of this tool among caregivers andhealthcare workers in The Gambia.Participants200 caregivers attending primary healthcare centres in The Gambia for routine immunisation services for their infants, and 15 healthcare workers employed to provide immunisation services at these clinics.

OUTCOME MEASURES

We calculated the median knowledge scores on vaccine-related information obtained at baseline, 1-month and 3-month follow-up visits. Wilcoxon's matched-pairs signed-rank test was used to compare the difference in the median knowledge scores between baseline and 1-month, and between baseline and 3-month follow-up visits.

RESULTS

Of the 113 caregivers who participated, 104 (92%) completed all three study visits, 108 (95.6%) completed the baseline and 1-month follow-up visits, and 107 (94.7%) completed the baseline and 3-month follow-up visits. The median knowledge score increased from 6.0 (IQR 5.0-7.0) at baseline to 11.0 (IQR 8.0-14.0) at 1-month visit (p<0.001), and 15.0 (IQR 10.0-20.0) at 3-month visit (p<0.001). Qualitative results showed high acceptability and enthusiasm for the Speaking Book among both caregivers and healthcare workers. The Speaking Book was widely shared in the community and this facilitated communication with healthcare workers at the primary healthcare centres.

CONCLUSIONS

Context-specific and subject-specific Speaking Books are a useful communication and educational tool to increase caregiver vaccine knowledge in low/middle-income countries.

Determinants of vaccination dropout among children 12-23 months age in north Gondar zone, northwest Ethiopia, 2019

BACKGROUND

Vaccination is a proven tool in preventing and eradicating childhood infectious diseases. Each year, vaccination averts an estimated 2-3 million deaths from vaccine preventable diseases. Even though immunization coverage is increasing globally, many children in developing countries still dropout vaccination. The objective of this study was to identify determinants of vaccination dropout among children age 12-23 months in North Gondar, North west Ethiopia.

METHODS

Community based unmatched case-control study was conducted in north Gondar from March 1-27, 2019 among 366 children age 12-23 months (92 cases and 274 controls). Multistage sampling was used for reaching to the community. Data were collected from mothers who had 12-23 months age children using a pretested structured face to face interview. Data were entered using Epi info v. 7 and exported to SPSS v. 20 for analysis. On multivariable logistic regression variables with P-value <0.05 at 95% CI were considered statistically significant.

RESULT

Counseling for mothers about vaccination (AOR = 7.2, 95% CI: (2.93-17.5)); fear of vaccine side effects (AOR = 3.5, 95% CI: (1.56-8.12)); PNC attended (AOR = 3.6, 95% CI: (1.52-8.39)) and mothers not received tetanus toxoid vaccination (AOR = 2.4, 95% CI: (1.03-5.35)) were found risk factors of vaccination dropout.

CONCLUSION

Counseling on vaccination, fear of vaccine side effects, PNC attended and mothers' tetanus toxoid vaccination status during ANC visit were found risk factors. Management bodies and health workers need to consider "reaching every community" approach, Counsel every mother at any opportunity, and provide TT vaccination for all pregnant mothers helps to reduce vaccination dropout among children.

Prevalence and determinants of incomplete or not at all vaccination among children aged 12-36 months in Dabat and Gondar districts, northwest of Ethiopia: findings from the primary health care project

OBJECTIVE

Ethiopia is one of the Africa's signatory countries for implementation of the primary healthcare strategy including immunisation. In Ethiopia, however, 16% of child death is due to vaccine-preventable disease. Thus, this study aimed to assess the prevalence and determinants of incomplete or not at all vaccination among children aged 12-36 months in Dabat and Gondar districts, Northwest Ethiopia.

STUDY DESIGN

The study is community-based cross-sectional study.

STUDY SETTING

Dabat and Gondar Zuria districts, Northwest Ethiopia.

PARTICIPANTS

Mothers/caregivers with children aged 12-36 months were enrolled in the study. Participants were randomly selected through systematic sampling and a total of 603 participants were included in the analysis.

METHODS

A binary logistic regression analysis was done. In the multivariable logistic regression analysis, a p value of <0.05 and adjusted OR (AOR) with 95% CI were used to identify statistically associated factors with incomplete or not at all vaccination.

OUTCOMES

Incomplete or not at all vaccination.

RESULTS

The prevalence of incomplete or not at all vaccinated children was 23.10% (95% CI 16.50 to 29.70). The multivariable analysis revealed that the odds of incomplete or not at all vaccination were higher among mothers who had no antenatal care (ANC) visit (AOR: 1.81, 95% CI 1.21 to 4.03) and no postnatal care (PNC) visit (AOR=1.52, 95% CI 1.05 to 2.25).

CONCLUSIONS

In the study area, nearly one-fourth of children are incompletely or not at all vaccinated. Our finding suggests that ANC and PNC visits are key determinants of incomplete or not at all vaccination. Thus, in low-resource settings like Ethiopia, the health system approaches to improved ANC and PNC services should be intensified with more effective advice on child immunisation to reduce vaccine preventable disease.

Complete basic childhood vaccination and associated factors among children aged 12-23 months in East Africa: a multilevel analysis of recent demographic and health surveys

Background

Complete childhood vaccination remains poor in Sub-Saharan Africa, despite major improvement in childhood vaccination coverage worldwide. Globally, an estimated 2.5 million children die annually from vaccine-preventable diseases. While studies are being conducted in different East African countries, there is limited evidence of complete basic childhood vaccinations and associated factors in East Africa among children aged 12–23 months. Therefore, this study aimed to investigate complete basic childhood vaccinations and associated factors among children aged 12–23 months in East Africa.

Methods

Based on the Demographic and Health Surveys (DHSs) of 12 East African countries (Burundi, Ethiopia, Comoros, Uganda, Rwanda, Tanzania, Mozambique, Madagascar, Zimbabwe, Kenya, Zambia, and Malawi), secondary data analysis was performed. The study included a total weighted sample of 18,811 children aged 12–23 months. The basic childhood vaccination coverage was presented using a bar graph. Multilevel binary logistic regression analysis was fitted for identifying significantly associated factors because the DHS has a hierarchical nature. The Intra-class Correlation Coefficient (ICC), Median Odds Ratio (MOR), Proportional Change in Variance (PCV), and deviance (−2LLR) were used for checking model fitness, and for model comparison. Variable with p-value ≤0.2 in the bi-variable multilevel analysis were considered for the multivariable analysis. In the multivariable multilevel analysis, the Adjusted Odds Ratio (AOR) with 95% Confidence Interval (CI) were reported to declare the significance and strength of association with full vaccination.

Results

Complete basic childhood vaccination in East Africa was 69.21% (95% CI, 69.20, 69.21%). In the multivariable multilevel analysis; Mothers aged 25–34 years (AOR = 1.21, 95% CI: 1.10, 1.32), mothers aged 35 years and above (AOR = 1.50, 95% CI: 1.31, 1.71), maternal primary education (AOR = 1.26, 95% CI: 1.15, 1.38), maternal secondary education and above (AOR = 1.54, 95% CI: 1.36, 1.75), husband primary education (AOR = 1.25, 95% CI: 1.13, 1.39), husband secondary education and above (AOR = 1.24, 95% CI: 1.11, 1.40), media exposure (AOR = 1.23, 95% CI: 1.13, 1.33), birth interval of 24–48 months (AOR = 1.28, 95% CI: 1.15, 1.42), birth interval greater than 48 months (AOR = 1.35, 95% CI: 1.21, 1.50), having 1–3 ANC visit (AOR = 3.24, 95% CI: 2.78, 3.77), four and above ANC visit (AOR = 3.68, 95% CI: 3.17, 4.28), PNC visit (AOR = 1.34, 95% CI: 1.23, 1.47), health facility delivery (AOR = 1.48, 95% CI: 1.35, 1.62), large size at birth 1.09 (AOR = 1.09, 95% CI: 1.01, 1.19), being 4–6 births (AOR = 0.83, 95% CI: 0.75, 0.91), being above the sixth birth (AOR = 0.60, 95% CI: 0.52, 0.70), middle wealth index (AOR = 1.16, 95% CI: 1.06, 1.28), rich wealth index (AOR = 1.20, 95% CI: 1.09, 1.33), community poverty (AOR = 1.21, 95% CI: 1.11, 1.32) and country were significantly associated with complete childhood vaccination.

Conclusions

In East Africa, full basic childhood vaccine coverage remains a major public health concern with substantial differences across countries. Complete basic childhood vaccination was significantly associated with maternal age, maternal education, husband education, media exposure, preceding birth interval, number of ANC visits, PNC visits, place of delivery, child-size at birth, parity, wealth index, country, and community poverty. Public health interventions should therefore target children born to uneducated mothers and fathers, poor families, and those who have not used maternal health services to enhance full childhood vaccination to reduce the incidence of child mortality from vaccine-preventable diseases.

Predictors of immunization coverage among 12-23 month old children in Ethiopia: systematic review and meta-analysis

BACKGROUND

Immunization is one of modern medicine's greatest achievements in the last three decades. Annually it can prevent nearly 2 to 3 million deaths. Understanding the determinants of effective immunization coverage is a critical undertaking. Accordingly, we set out to check the best available evidence of outstanding predictors of immunization coverage among children aged 12-23 months in Ethiopia.

METHOD

Electronic databases including PubMed, Google Scholar, HINARI, and SCOPUS, Web of Science, African Journals Online, Ethiopian Medical Journals were searched. The search process, study selection, critical appraisal, and data extraction were done independently by two reviewers using Joanna Briggs Institute Meta-analysis for Review Instrument (JBI-MAStARI). The difference between reviewers was resolved with a third person. The risk of bias was assessed by the Newcastle Ottawa Tool for observational studies. Data were extracted using the Microsoft Excel checklist and exported to STATA 13. Heterogeneity was assessed using I2, Funnel plot and Egger's test was used to check for publication bias.

RESULTS

We identified 26 studies with 15,042 children with mothers/caretakers to assess factors associated with immunization coverage and significant factors were: maternal formal education, (OR = 2.45; 95% CI: 1.62-3.72), paternal formal education, (OR = 1.01; 95% CI: 0.27-3.77), residence, (OR = 2.11; 95% CI: 1.00-4.45), birth at health facility (OR = 1.86; 95% CI: 0.99-3.49), family size less than four, (OR = 1.81; 95% CI: 1.16-2.84), knowledge on age of immunization to be completed (OR = 6.18;95% CI: 3.07-12.43), knowledge on immunization schedule (OR = 2.49; 95% CI: 1.35-4.59), time to travel to health faculties, (OR = 1.74; 95% CI: 0.62-4.89), antennal care, (OR = 3.11; 95% CI: 1.64-5.88), and tetanus toxoid vaccination, (OR = 4.82; 95% CI: 2.99-7.75).

CONCLUSION

Our findings showed that literacy, residence, awareness, family size, maternal health services use, and proximity of the health facilities were factors associated with full immunization. This implies that there is a need for primary health service expansion and health education to "hard to reach areas" to improve immunization coverage for children aged 12-23 months.

Geographic location of health facility and immunization program performance in Hoima district, western Uganda: a health facility level assessment

Background

Globally, immunization coverage for childhood vaccines is below the immunization target of achieving at least 90% coverage with the pentavalent vaccine. In Uganda, a recent survey shows 80% of districts had poor immunization program performance. However, there is significant variation in performance within and between districts. We hypothesized that geographic location of a health facility may influence performance of its immunization programs. Therefore, the purpose of this study was to examine whether geographical location of a health facility within a district is associated with performance of the immunization program in Hoima district, western Uganda.

Methods

We conducted a cross sectional study using a mixed methods approach. The main study unit was a health center and we also interviewed health workers in-charge of the facilities and reviewed their health facility records. We reviewed the Uganda Health Management Information System (HMIS) 105 reports of six months to obtain data on immunization program performance. Performance was categorized using World Health Organization’s Reach Every District (RED) criteria and classified as poor if a facility fell in category 3 or 4 and good if 1 or 2. We also conducted key informant interviews with immunization focal persons in the district. We examined the association between dependent and independent variables using Fisher’s exact test.

Results

We collected data at 49 health facilities. Most of these facilities (55.1%) had poor immunization program performance. Proximal location to the central district headquarters was significantly associated with poor immunization program performance (p < 0.05). Attitudes of health workers in the more urban areas, differences in strategies for outreach site selection and community mobilization in the rural and urban areas were suggested as possible explanations.

Conclusions

Proximal location to the urban setting near district headquarters was strongly associated with poor immunization program performance. To be able to reach larger numbers of children for vaccination, interventions to improve performance should target health facilities in urban settings.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12889-020-09859-z.

Factors associated with the utilization of inactivated polio vaccine among children aged 12 to 23 months in Kalungu District, Uganda

Uganda officially introduced the inactivated polio vaccine (IPV) in May 2016 as part of the polio eradication strategy and integrated it into its routine immunization programme in addition to the oral polio vaccine. The current coverage stands at 60% as of July 2017. We therefore aimed to determine factors associated with the uptake of IPV among children in Kalungu District so as to inform the implementation of the vaccine policy. A community-based cross-sectional study was conducted among caregivers of 406 eligible children aged 12-23 months through multi-stage systematic sampling and a standardized semi-structured questionnaire. Nine key informant interviews were conducted through purposive selection of health care providers and members of Village Health Teams (VHTs) based on their expertize. Modified Poisson regression and thematic content analysis were used to determine factors significant to IPV uptake among children. 71% of sampled children aged 12-23 months had received IPV in Kalungu District. The survey found that being encouraged by health workers and VHTs was significant to children's uptake of IPV (Adjusted PR 1.24, 95% CI; 1.22-3.47). Distance to the immunization point (Adjusted PR 0.32,95% CI; 0.16-0.62) and caregiver's education level (Adjusted PR 1.16,95% CI; 1.05-2.22) were also associated with IPV uptake. Qualitative findings from health workers and VHT members further confirmed the perception that distance to the immunization post was important, and VHTs also stated that being encouraged by health workers was critical to IPV uptake. The current prevalence of IPV uptake among children aged 12-23 months in Kalungu is 71%, higher than the last reported national coverage (60%), though still below the recommended national coverage of 95%. Efforts should be focused on sensitization of caregivers through health workers and VHTs. Immunization outreach should be strengthened so as to bring services closer to patients.

Incomplete Vaccination and Its Predictors among Children in Ethiopia: A Systematic Review and Meta-Analysis

Background. Vaccination is an effective public health intervention that has contributed to a substantial reduction in the burden of vaccine-preventable diseases. Abridged evidence on incomplete vaccination is not well established in Ethiopia. Therefore, this meta-analysis aimed to estimate the pooled prevalence of incomplete vaccination and its predictors among children aged 12 to 23 months. Methods. Primary studies conducted in Ethiopia were searched. The methodological quality of the included studies was assessed using the Joanna Briggs Institute (JBI) checklist. The analysis was conducted using STATA 14 and RevMan. The presence of statistical heterogeneity was checked using the Cochran Q test, and its level was quantified using I2 statistics. Pooled prevalence and odds ratio (OR) were computed at a 95% confidence interval (CI). Results. The pooled prevalence of incomplete vaccination was 30% (95% CI: 25-35). Maternal illiteracy (OR = 1.96; 95% CI: 1.40, 2.74) and home delivery (OR = 2.78; 95% CI: 2.28, 3.38) were associated factors that increased incomplete vaccination. However, maternal autonomy (OR = 0.54; 95% CI: 0.33, 0.89), maternal knowledge (OR = 0.31; 95% CI: 0.20, 0.47), husband employment (OR = 0.49; 95% CI: 0.35, 0.67), urban residence (OR = 0.61; 95% CI: 0.43, 0.86), ANC visits (OR = 0.30; 95% CI: 0.23, 0.39), postnatal care (OR = 0.39; 95% CI: 0.30, 0.52), and tetanus toxoid vaccine (3+) (OR = 0.42; 95% CI: 0.26, 0.69) were factors that reduced incomplete vaccination. Conclusion. In Ethiopia, 3 out of 10 children have incomplete vaccination. Policies should focus on strengthening and improving women’s education, maternal health knowledge, empowering women, and the utilization of prenatal care can overcome some of the barriers.