Exploring immunisation inequities among migrant and refugee children in New Zealand

Vaccine Coverage at 36 Months and 7 Years by Parental Birth Country, Washington State

BACKGROUND AND OBJECTIVES

Ensuring equitable vaccination access for immigrant communities is critical for guiding efforts to redress health disparities, but vaccine coverage data are limited. We evaluated childhood vaccination coverage by parental birth country (PBC) through the linkage of Washington State Immunization Information System data and birth records.

METHODS

We conducted a retrospective cohort evaluation of children born in Washington from January 1, 2006 to November 12, 2019. We assessed up-to-date vaccination coverage status for measles, mumps, and rubella (MMR), diphtheria, tetanus, and pertussis (DTaP), and poliovirus vaccines at ages 36 months and 7 years. Children with ≥1 parent(s) born in selected non-US countries were compared with children with 2 US-born parents, using Poisson regression models to provide prevalence ratios.

RESULTS

We identified 902 909 eligible children, of which 24% had ≥1 non-US-born parent(s). Vaccination coverage at 36 months by PBC ranged from 41.0% to 93.2% for ≥1 MMR doses and ≥3 poliovirus doses and 32.6% to 86.4% for ≥4 DTaP doses. Compared with children of US-born parents, the proportion of children up to date for all 3 vaccines was 3% to 16% higher among children of Filipino-, Indian-, and Mexican-born parents and 33% to 56% lower among children of Moldovan-, Russian-, and Ukrainian-born parents. Within-PBC coverage patterns were similar for all vaccines with some exceptions. Similar PBC-level differences were observed at 7 years of age.

CONCLUSIONS

The linkage of public health data improved the characterization of community-level childhood immunization outcomes. The findings provide actionable information to understand community-level vaccination determinants and support interventions to enhance vaccine coverage.

Migration and infant immunization timeliness in New Zealand: Evidence from the Growing Up in New Zealand study

BACKGROUND

Migration has been recognized as an important determinant of child health outcomes including childhood vaccination status. This paper aims to examine the association between parental migration status and a less studied aspect of child immunization outcomes, namely timeliness, within the context of New Zealand (NZ), a country characterized by a substantial proportion of its resident population born overseas. Additionally, the study explored the impact of residential duration on children's immunization timeliness.

METHODS

The data was taken from a large, representative population-based cohort study in NZ (Growing Up in NZ study). A total of 6156 children and their parents, comprising 2241 foreign-born and 3915 NZ-born mothers and a sub-group of their partners were included in the analysis. The survey data was linked with the National Immunization Register dataset. Timely immunization was defined as receiving two vaccines at each scheduled vaccination point (at six-week, three-month, and five-month, totaling six doses of vaccines) within 30 days of their due date. We examined the associations between parental migration status, maternal residential duration, and child immunization timeliness while controlling for socio-economic variations. The results were presented as adjusted odds ratios (AORs) with 95 % confidence intervals (CIs).

RESULTS

The findings revealed that after adjustment for socioeconomic differences, children of foreign-born mothers exhibited higher odds of receiving all six studied vaccine doses on time compared to children of native-born mothers (AOR 1.51, 95 %CI:1.27-1.78). Similarly, having a foreign-born father was also significantly associated with timely completion of all six vaccine doses. Children of recent immigrants who had resided in the country for less than five years demonstrated higher odds of timely vaccination of all six vaccine doses compared to children of settled immigrants who had lived in the country for five or more years (AOR 1.65, 95 %CI: 1.25-2.19).

CONCLUSION

This study revealed a significant pattern in NZ where immigrants exhibited higher rates of timely immunization for their children compared to native-born parents. However, the findings also underscore the importance of providing support to settled immigrants, as their children experienced declines in timely vaccination rates compared to children of recent immigrants and even those born to NZ-born parents.

Exploring factors that influence vaccination uptake for children with refugee backgrounds: An interpretive description study of primary healthcare providers' perspectives

BACKGROUND

Children with refugee backgrounds are at high risk of acquiring vaccine preventable diseases (VPDs) due to a complex set of factors, one being under-immunisation. In Aotearoa New Zealand (NZ), reported age-appropriate vaccination rates are suboptimal among children with refugee backgrounds.

METHODS

A qualitative interpretive description study was undertaken to explore factors associated with access and uptake of immunisations and develop strategies to improve age-appropriate vaccinations among refugee children post-resettlement in NZ. Semi-structured interviews were conducted with healthcare providers (nurses and doctors) (N = 14) across seven resettlement locations in NZ. Collected data was transcribed verbatim and thematically analysed.

RESULTS

Five themes were derived from the data that demonstrate the interrelated factors that influence vaccination uptake across the refugee caregiver, health provider and system levels. Providers discussed how caregivers' competing resettlement priorities and challenges early in the resettlement phase influenced their knowledge and access of vaccines and health services in NZ. Providers' knowledge of refugee caregivers' concerns was seen as a driver for positive change in forming therapeutic relationships with, and delivering health services to, former refugees. They discussed system level factors that influence access to and provision of immunisation services, such as resourcing, resettlement policies, system inefficiencies and missed opportunities. Emphasis was placed on communication between patients and providers to facilitate positive immunisation experiences. Overwhelming, providers displayed high motivation to improve immunisation services. Strategies were suggested to overcome identified barriers and included the provision of culturally and linguistically appropriate resources, education campaigns, reducing access barriers (e.g., after-hours clinics), and improving system efficiencies.

CONCLUSIONS

These findings highlight root factors that impact immunisation uptake and experiences among children with refugee backgrounds. To reduce the burden of VPDs, broad system level changes are required to address the barriers to vaccine uptake faced by both families of refugee backgrounds and health providers.

Paediatric COVID-19 vaccination coverage and associated factors among migrant and non-migrant children aged 5-11 years in Aotearoa New Zealand: A population-level retrospective cohort study

OBJECTIVE

Children with migrant and refugee backgrounds may experience immunisation inequities due to barriers to accessing and accepting vaccines. In Aotearoa New Zealand (NZ), national reporting can mask inequities in coverage by migration background. This study explored paediatric COVID-19 vaccine uptake among children with migrant and refugee backgrounds.

METHODS

This population-level retrospective cohort study compared rates and determinants of paediatric COVID-19 vaccine uptake as of July 2022 amongst migrant and non-migrant children who were aged between 5 and 11 years as of January 2022. Linked de-identified administrative and health data available in Statistics NZ's Integrated Data Infrastructure were used, and univariate and multivariable logistic regression were conducted to determine associations.

RESULTS

Of the total study population (N = 451,323), 3.5% were overseas-born migrant children, 31.3% were NZ-born migrant children, and 65.3% were NZ-born non-migrant children. Only 50.8% (229,164 out of 451,323) of children had received at least one dose. Migrant children were significantly more likely to have received a COVID-19 vaccination than non-migrant children. Logistic modelling revealed that all factors, including ethnicity, gender, age, family type, household income, deprivation, region, parent COVID-19 vaccination status, and child's previous COVID-19 infection, significantly influenced COVID-19 vaccine uptake. The largest contributing factor was parents' COVID-19 vaccination status.

CONCLUSIONS

The findings suggest that NZ's paediatric COVID-19 vaccination programme was able to address logistical and motivational barriers commonly identified amongst migrants and refugees.

IMPLICATIONS FOR PUBLIC HEALTH

As parents' vaccination status is an important factor in vaccinating their own children, continuous efforts are needed to support confident parental COVID-19 vaccine decision-making. To address social inequities, engagement with marginalised communities to co-design tailored and localised approaches is recommended.

Childhood vaccination uptake among children born in Aotearoa New Zealand based on parental nationality

Migrants and refugees generally experience immunization inequities compared to their host populations. Childhood vaccination coverage rates are influenced by a complex set of interrelated factors, including child and parental nativity. Coverage rates for MMR, pertussis, and HPV vaccines were compared among children born in Aotearoa New Zealand (NZ) of overseas-born parents or NZ-born parents. A nationwide retrospective cohort study was conducted using linked, de-identified data. Logistic regression models examined the most influential factors contributing to differences in timely vaccine uptake. Of the total study population who had received all scheduled vaccines (N = 760,269), 32.9% were children of migrant parents. Children of migrant parents had higher rates of complete and timely uptake for MMR, pertussis, and HPV vaccinations compared to non-migrant children. NZ-born children of migrant parents were significantly more likely to receive MMR and pertussis-containing vaccines on-time compared to those of non-migrants. All included factors, except for the child's gender and parents' English ability, significantly influenced vaccine uptake. Among NZ-born children of migrant parents, additional logistic modeling found significant differences based on parental duration of residence, visa group, and region of nationality. Findings point to the importance of differentiating between parent versus child nativity when examining immunization coverage. While vaccination rates were higher for NZ-born children of migrant parents, compared to non-migrant parents, timely coverage rates across both groups were below national targets. Continued efforts are needed to improve timely immunization service delivery to address suboptimal and inequitable coverage.

"She vaccinated my baby and that's all…" Immunisation decision-making and experiences among refugee mothers resettled in Aotearoa New Zealand

BACKGROUND

To prevent disease outbreaks, refugee children must be age-appropriately immunised. This qualitative study gained an in-depth understanding of refugee mothers' vaccine decision-making and experiences accessing immunisation services for their children post-resettlement in Aotearoa New Zealand.

METHODS

An interpretive description methodology involving focus groups with refugee mothers (N = 45) was conducted in Auckland, one of the resettlement locations. Mothers were asked about their perceptions of vaccine-preventable diseases and vaccines, their experiences of attending immunisation events, and their suggestions for improvements to immunisation services. Data were analysed following the phases of reflexive thematic analysis.

RESULTS

Four themes were constructed. Do I have a choice? Mothers displayed pro-vaccination sentiments and parental obligation to vaccinate their children to protect their health, which underpinned their compliance with the national vaccine schedule. Transnational vaccine perceptions and behaviours It was evident that comparing their health experiences in their origin countries reinforced their positive perceptions of and trust in vaccines, health providers and their recommendations, the health system and government in New Zealand. Information sharing with their transnational networks had the potential to influence vaccine perceptions and behaviours in home and host countries. Unanswered questions and concerns Mothers discussed how many of their questions and concerns about immunisations and post-vaccine management went unanswered. Relationships and experiences matter Mothers stressed the importance of who vaccinated their child and how it was administered, highlighting that health providers' demeanour and competence influence their immunisation experiences.

CONCLUSIONS

Health providers are encouraged to focus on creating a positive immunisation experience for refugee background families. Qualified interpreters and provision of culturally and linguistically appropriate information are required. Transnationalism at the individual level appears to influence vaccine perceptions and behaviours among refugee-background mothers. Future research focusing on caregivers with child(ren) who are not fully vaccinated would be beneficial.

Experiences of migrant mothers attending vaccination services at primary healthcare facilities

Background

Migration to South Africa is currently dominated by women and children, for socio-economic and refugee reasons or to utilise the healthcare system for various services. Migrants and refugees are at risk of vaccine-preventable diseases, and many of their children have an incomplete or unknown immunisation status.

Aim

This study aimed to explore the experiences of migrant mothers in utilising child immunisation services in primary healthcare facilities.

Setting

Ten primary healthcare facilities that were providing immunisation services, located in the Buffalo City Metropolitan Municipality, Eastern Cape province, South Africa.

Methods

A qualitative research design, making use of in-depth interviews (IDIs) from 18 purposefully selected migrant women, was used for data collection. Thematic content analysis was used to analyse the recorded data of the experiences of study participants in their access to immunisation services.

Results

From the IDIs, four themes were identified: difficulty in communicating with the healthcare workers because of language barriers, access challenges, interpersonal barriers and interpersonal relationships were identified in this study, which influenced the utilisation of immunisation services by migrant mothers.

Conclusion

The findings of this study support and reinforce the duty of the South African government and healthcare facilities to work together to improve migrant women's access to immunisation services.

Contribution

A positive relationship between healthcare workers and migrant mothers while accessing immunisation services should contribute to reducing child mortality in South Africa and achieving Sustainable Development Goal 3 by the year 2030.

MMR vaccine coverage and associated factors among overseas-born refugee children resettled in Aotearoa New Zealand: a national retrospective cohort study

Background

Refugee children may be under-immunised against common vaccine-preventable diseases due to a myriad of factors related to their migration journey.

Methods

This retrospective cohort study explored the rates and determinants of enrolment on the National Immunisation Register (NIR) and measles, mumps and rubella (MMR) coverage among refugee children up to 18 years old who resettled in Aotearoa New Zealand (NZ) from 2006 to 2013. Univariate and multivariable logistic regression were conducted to determine associations.

Findings

Of the cohort (N = 2796), two thirds of the children (69%) were enrolled on the NIR. Among this sub-cohort (n = 1926), less than one third (30%) were age-appropriately vaccinated with MMR. MMR coverage was highest among younger children and improved over time. Logistic modelling revealed that visa category, year of arrival, and age group were significant factors that influenced NIR enrolment and MMR vaccine uptake. Those arriving via asylum seeking, family reunification and humanitarian pathways were less likely to be enrolled and vaccinated compared to refugees who entered under the national quota programme. More recent arrivals and younger children were more likely to be enrolled and vaccinated compared to children who arrived in NZ longer ago and were older.

Interpretation

Resettled refugee children have suboptimal NIR enrolment and MMR coverage rates which varied significantly by visa category, highlighting the need for immunisation services to better engage with all refugee families. These findings suggest that broad structural factors related to policy and immunisation service delivery may influence the differentials seen.

Funding

Health Research Council of New Zealand (18/586).

Vaccine hesitancy and its determinants among refugee parents resettled in Aotearoa New Zealand

Vaccine hesitancy is an important factor underpinning suboptimal vaccine uptake and evidence on marginalized subgroups, such as refugees, is limited. This cross-sectional survey was conducted in 2020/21 with former refugee parents who resettled in Aotearoa New Zealand (NZ). The Parent Attitudes about Childhood Vaccines (PACV) was offered in Somali, Oromo, Arabic, and English languages, and the reliability of the four versions were evaluated. The prevalence of parental vaccine hesitancy was explored and the association between vaccine hesitancy and sociodemographic factors was examined using logistic regression. One hundred and seventy-eight responses were included in the analysis. The Cronbach's alpha scores for Somali, Oromo, Arabic, and English PACV were 0.89, 0.64, 0.53, and 0.77, respectively. The rate of parental vaccine hesitancy was 16.3%, 95% CI (10.7, 21.3). Most caregivers were concerned about vaccine side effects (47%), safety (43%), and efficacy (40%). Less than a quarter (21%) of parents had delayed their child receiving a vaccine and 12% had refused to vaccinate their child for reasons other than medical exemptions. After adjusting for covariate/s, parents' primary source of information and education status were significantly associated with vaccine hesitancy. Media as a primary source of vaccine information and low education status were associated with higher vaccine hesitancy. Vaccine hesitancy is relatively low among former refugees and is influenced by modifiable factors, including educational level and primary source of vaccine information. Vaccine information tailored to former refugee parents' concerns are required to reduce vaccine hesitancy and improve vaccine uptake.

'As Long as It's Used for Beneficial Things': An Investigation of non-Māori, Māori and Young People's Perceptions Regarding the Research use of the Aotearoa New Zealand Integrated Data Infrastructure (IDI)

The Aotearoa New Zealand Integrated Data Infrastructure (IDI) is a national database containing a wide range of data about people and households. There is limited information about public views regarding its use for research.A qualitative study was undertaken to examine the views of forty individuals attending a large hospital in Auckland, including those of Māori ethnicity and young people. Semi-structured interview data were analysed using Braun and Clarke's method of thematic analysis.Seven key themes emerged: 1) Limited knowledge about medical data held in national databases; 2) Conditional support for the use of the IDI, including for research; 3) Concerns regarding the misuse of IDI data; 4) The importance of privacy; 5) Different views regarding consent for use of data for research; 6) Desire for access to personal data and the results of research; and 7) Concerns regarding third party and commercial use. Young people and those of Māori ethnicity were more wary of data misuse than others.Although there is reasonable support for the secondary use of public administrative data in the IDI for research, there is more work to be done to ensure ethical and culturally appropriate use of this data via improved consent privacy management processes and researcher training.

Understanding barriers to immunisation against vaccine-preventable diseases in Pacific people in New Zealand, Aotearoa: an integrative review

Introduction Pacific people have an increased risk of hospitalisation if barriers to immunisation against vaccine-preventable diseases are not reduced. This research sought to determine what is known about the barriers to immunisations in Pacific people living in New Zealand and identify ways to reduce these barriers and inform health care. Aim To identify the barriers to immunisation for Pasifika and to identify ways to reduce these barriers and inform health care. Methods An integrative review was undertaken with databases searched for articles published between February 2021 and May 2021. The review follows the five-stage process of problem formulation; literature search; evaluation of data; data analysis and interpretation; and presentation of the results through discussion. Results Twelve studies were included. Three themes were identified: Deprivation, Health Literacy (which covered understanding the importance of immunisation programmes, attitudes and beliefs and communication), and access to health care (including communication accessibility to health professionals and physical access). Discussion This review has identified that barriers such as level of deprivation strongly influences immunisation uptake in Pacific people. The significance of government-led initiatives was shown to improve the rates of immunisation of Pacific children. Pacific people's awareness of immunisation programmes and government campaigns are encouraged to incorporate ethnic-specific strategies in addressing barriers, such as bringing vaccinations to where Pacific people frequent, including churches, community hubs, and venues that parents can easily access.

Longitudinal research in Aotearoa New Zealand using the Integrated Data Infrastructure: a review

The Integrated Data Infrastructure (IDI) is a collection of deidentified whole population administrative datasets, linked at the individual level, and made available through Stats NZ for 'public good' research. This paper reviews longitudinal research that has been undertaken using the IDI, and highlights the strengths, weaknesses, opportunities, and threats of using the IDI for longitudinal research. It is argued that the IDI can and has been used for longitudinal research that would be difficult or impossible to undertake without a resource such as the IDI, including longitudinal research involving small, sometimes marginalised populations, research involving intergenerational research and quasi-experimental family designs, and research investigating residential variations in the natural environment. However, issues regarding ethical governance need addressing. Researchers wishing to use the IDI should familiarise themselves with its limitations, particularly around what service use data capture and what this represents, what is missed by assessing only deficit-focused data, and the variable quality of the data.

Exploring electronic health records to estimate the extent of catch-up immunisation and factors associated with under-immunisation among refugees and asylum seekers in south east Queensland

BACKGROUND

Australia is one of the leading countries resettling people from refugee-like backgrounds. Catch-up immunisation is a key priority in this cohort. However, few studies have included asylum seekers and the adult age group in their study sample. In addition, Electronic Health Records (EHR) has recently been recognised as a vital tool in big data analysis with the capacity to contribute to informed strategic decision making. As such, the main aim of this study is to explore EHR routinely used in a specialised refugee clinic in South East Queensland to estimate the extent of catch-up immunisation and assess the factors associated with under-immunisation among refugees and asylum seekers.

METHODS

A quantitative study involving a secondary data analysis on a pre-existing dataset was undertaken. Relevant data was extracted from the EHR in the clinic. SPSS was used to perform Statistical data analysis.

RESULTS

The majority of clients originated from Papua New Guinea, followed by Iran and Afghanistan. When assessing the uptake of catch-up immunisations among refugees and asylum seekers, MMR (Measles-Mumps-Rubella), Polio and DTP (Diphtheria-Tetanus-Pertussis) had the highest uptake, while HPV (Human Papilloma Virus), Pneumococcal and Hib (Haemophilus influenza type b) immunisations had the lowest uptake. Binary logistic regression revealed that the younger patients, the refugees (compared to asylum seekers) and those with a longer residential duration in Australia are at a higher risk of being under-immunised.

CONCLUSION

This study indicates that the broader group of immigrants, and in particular refugees and asylum seekers, do not represent a homogenous group in terms of immunisation coverage, and that each cohort should be carefully considered during immunisation interventions and strategies. This will be particularly important during targeted health promotions and future immunisation programs in this cohort.

Vaccine coverage in children born to migrant mothers in Australia: A population-based cohort study

BACKGROUND

Overall, infant immunisation coverage is currently >90% in Australia, but there are pockets of under-immunised children including children from migrant backgrounds. This study aimed to examine whether on-time vaccination coverage of diphtheria-tetanus-pertussis dose 3 (DTP3) for children born in Australia differed by mother's region of birth and if so, what factors were associated with these differences.

METHODS

We conducted a population-based cohort study using linked data on perinatal, immunisation and birth records for 2 million children born in Western Australia and New South Wales between 1996 and 2012. We assessed on-time coverage of DTP3 (vaccination from 2 weeks prior to, and up until 30 days after, the due date) in children with mothers born overseas. Logistic regression models were developed to determine factors associated with on-time coverage for each maternal region of birth and all regions combined, adjusting for a range of demographic factors. Adjusted estimates of coverage were calculated for the different regions of birth.

RESULTS

On-time DTP3 coverage was 76.2% in children of Australian born mothers, lower in children of mothers from Oceania (66.7%) and North America (68%), and higher in children born to mothers from South-East Asia (79.9%) and Southern Asia (79.3%). While most variables were consistently associated with lower coverage in all regions of birth, higher socioeconomic status and jurisdiction of birth showed varied results. Adjusted estimates of DTP3 coverage increased in children born to mothers from Australia (78.3%), Oceania (70.5%), Northern Africa (81.5%) and the Middle East (79.6%). DTP3 coverage decreased in children born to mothers from Europe and former USSR (74.6%), North-east Asia (75.2%), Southern Asia (76.7%), North America (65.5) and South/Central America and the Caribbean (73.2%).

CONCLUSIONS

On-time vaccination rates differed by mother's region of birth. More research is needed to determine the main reasons for these remaining differences to improve vaccine uptake and also help guide policy and practice.

Vaccine-Preventable Disease-Associated Hospitalisations Among Migrant and Non-migrant Children in New Zealand

Migrants may experience a higher burden of vaccine-preventable disease (VPD)-associated hospitalisations compared to the host population. A retrospective cohort study from 2006 to 2015 was conducted that linked de-identified data from government sources using Statistic NZ's Integrated Data Infrastructure. VPD-related hospitalisations were compared between three cohorts of children from birth to 5 years old: foreign-born children who migrated to NZ, children born in NZ of recent migrant mothers, and a comparator group of children born in NZ without a recent migration background. VPD-related hospitalisation rates were higher among NZ-born non-migrant children compared to NZ-born migrant and foreign-born children for all of the diseases of interest. For instance, 5.21% of NZ-born non-migrant children were hospitalised at least once due to all-cause gastroenteritis compared to 4.47% of NZ-born migrant children and only 1.13% of foreign-born migrant children. The overall hospitalisation rate for NZ-born non-migrant children was 3495 hospitalisations per 100,000 person years. Among children with migrant backgrounds, higher hospitalisation rates were noted among those of Pacific ethnicity and those with refugee backgrounds. Those arriving on Pacific visa schemes were hospitalised at rates ranging from 2644/100,000 person years among foreign-born migrant children and 4839/100,000 person years among NZ-born migrant children. Foreign-born quota refugee children and NZ-born children of quota refugee mothers were hospitalised at a rate of 4000-5000/100,000 person years. It is important to disaggregate migrant data to improve our understanding of migrant health. Children need to be age-appropriately vaccinated, and other individual and environmental factors addressed, to reduce the risk of infectious diseases.

Refugee and Asylum-Seeking Children: Interrupted Child Development and Unfulfilled Child Rights

The 21st century phenomenon of "global displacement" is particularly concerning when it comes to children. Childhood is a critical period of accelerated growth and development. These processes can be negatively affected by the many stressors to which refugee and asylum-seeking children are subjected. The United Nations Convention on the Rights of the Child (CRC) is the most ratified human rights treaty in history, with 196 States Parties (SPs). The CRC provides a framework of 54 articles outlining government responsibilities to ensure the protection, promotion, and fulfillment of rights of all children within their jurisdictions. Among these are the rights of refugee and asylum-seeking children, declared under Article 22 of the CRC. Refugee and asylum-seeking children, similarly to all other children, are entitled to their rights under the CRC and do not forgo any right by virtue of moving between borders. The hosting governments, as SPs to the CRC, are the primary duty bearers to fulfill these rights for the children entering their country. This manuscript provides an overview of the health and developmental ramification of being displaced for refugee and asylum-seeking children. Then, an in-depth analysis of the provisions under Article 22 is presented and the responsibilities of SPs under this article are described. The paper provides some international examples of strengths and shortcomings relating to these responsibilities and closes with a few concluding remarks and recommendations.