Child and adolescent immunizations: selected review of recent US recommendations and literature

Trends in Vaccination Coverage among Children Aged 2-6 Years in Tennessee Counties, 2017-2023

Background/Objectives: This study examines trends in county-level vaccination coverage before, during, and after the COVID-19 pandemic among children aged 2-3 and 4-6 years in Tennessee, with a focus on rurality; Methods: Data from the Tennessee Immunization Information System (January 2017 to September 2023) were analyzed for vaccination coverage in children in both age groups. The study categorized the COVID-19 pandemic into three periods: pre-pandemic (P1: January 2017 to December 2019), stay-at-home (P2: January 2020 to May 2021), and reopening (P3: June 2021 to September 2023). Vaccination trends were stratified by vaccine type, rurality, sex, race and ethnicity; Results: During P1, there were no significant changes in trends of vaccination coverage percentages in both rural and urban counties for both age groups. However, vaccination coverage declined significantly during P2 and P3 compared to P1 for most vaccines, except for influenza, which initially increased but later declined. Rural counties experienced a more pronounced decline compared to urban counties during P2 and P3 for both age groups. Within rural and urban counties, vaccination coverage was higher among white children compared to black children, and among non-Hispanic compared to Hispanic children. There were higher coverage percentages in age group 4-6 for all vaccines, except for influenza, compared to 2-3 year group; Conclusions: The COVID-19 pandemic has exacerbated disparities in childhood vaccination coverage, particularly in rural areas. These findings highlight the need for targeted public health interventions to address barriers to vaccination and ensure equitable access to vaccines for all children.

Immunization of Solid Organ Transplant Candidates and Recipients: A 2022 Update

Immunizations are a relatively safe and cost-effective intervention to prevent morbidity and mortality associated with vaccine preventable infection (VPIs). As such, immunizations are a critical part of the care of pre and posttransplant patients and should be prioritized. New tools are needed to continue to disseminate and implement the most up-to-date vaccine recommendations for the SOT population. These tools will help both primary care providers and multi-disciplinary transplant team members taking care of transplant patients to stay abreast of evidence-based best practices regarding the immunization of the SOT patient.

Assessment of the willingness of dentists in the state of Indiana to administer vaccines

BACKGROUND

Human Papillomavirus associated oropharyngeal cancers have been on the rise in the past three decades. Dentists are uniquely positioned to discuss vaccination programs with their patients. The goal of this project was to assess the readiness of dentists in the state of Indiana in being able to administer vaccines.

METHODS

An 18-question online survey was sent to licensed dentists in the state of Indiana. Mantel-Haenszel chi-square tests, followed by multivariable analyses using ordinal logistic regression were conducted to assess providers' comfort levels and willingness to administer vaccines in both children and adults, by provider characteristics (practice type, location, and years in practice).

RESULTS

A total of 569 completed surveys were included for data analyses. Most dentists (58%) responded positively when asked if they would consider offering vaccinations in their office, if allowed by state legislation. In general, dentists working in academic settings and federally qualified health centers were more agreeable to offering vaccination in their practice. The level of agreement with "Dentists should be allowed to administer HPV, Influenza, Hep A and COVID 19 vaccines" for both children and adults decreased with increased years of practice. More than half of the respondents (55%) agreed that dental providers were competent to administer vaccines and needed no further training.

CONCLUSION

The study results suggest the willingness of dentists in the state of Indiana to offer vaccinations in their practices, if allowed by legislation.

PRACTICAL IMPLICATIONS

Dental providers can be a unique resource to add to workforce for improving vaccination efforts.

Use of Cost-Effectiveness Analyses for Decisions About Vaccination Programs for Meningococcal Disease in the United States, United Kingdom, The Netherlands, and Canada

INTRODUCTION

Meningococcal vaccines to protect against invasive meningococcal disease (IMD) vary in terms of vaccine technology and serogroup coverage (Polysaccharide MnACWY, conjugated C and ACWY, outer membrane vesicle-based or protein-based B vaccines), and the national recommendations for each of them vary in terms of target population and number of doses. We sought to understand factors associated with the evolution of meningococcal vaccination program recommendations in four countries with formal evaluation processes: the UK, US, the Netherlands, and Canada.

AREAS COVERED

A targeted review of published literature and internet sources for the four countries relating to meningococcal vaccination decision-making was conducted. The review focused on the impact of cost-effectiveness analyses on vaccine policy decisions and the extent to which variation in incidence of IMD and its potential catastrophic consequences influenced policy decisions.The evolution of meningococcal vaccine recommendations in the four countries was mainly driven by changes in vaccine availability and changes in serogroup incidence. Public pressure due to the catastrophic nature of IMD influenced recommendations. The role of cost-effectiveness analyses varied across the 4 countries.

EXPERT OPINION

The value of implementing meningococcal vaccination programs should be assessed using factors beyond those included in traditional cost-effectiveness analyses.

Barriers to Pretransplant Immunization: A Qualitative Interview Study of Pediatric Solid Organ Transplant Stakeholders

OBJECTIVES

To describe the experiences and beliefs of pediatric transplant stakeholders regarding factors that contribute to low pretransplant immunization rates.

STUDY DESIGN

Semistructured interviews were conducted with transplant team members (hepatologists, cardiologists, nephrologists, transplant nurse coordinators, and transplant infectious diseases physicians), primary care physicians, and parents of heart, liver, and kidney transplant recipients at 3 geographically diverse large pediatric transplant centers in the US. Interviews were conducted between July 2017 and February 2020 until thematic saturation was reached within each stakeholder subgroup. Content analysis methodology was used to identify themes.

RESULTS

Stakeholders participated in 30- to 60-minute interviews (16 transplant subspecialists, 3 transplant infectious diseases physicians, 11 transplant nurse coordinators, 12 primary care physicians, and 40 parents). Five central themes emerged: (1) gaps in knowledge about timing and safety of pretransplant immunizations, (2) lack of communication, coordination, and follow-up between team members regarding immunizations, (3) lack of centralized immunization records, (4) subspecialty clinic functioning as the medical home for transplant candidates but unable to provide all needed immunizations, and (5) differences between organ type in prioritization and completion of pretransplant immunization.

CONCLUSIONS

There are multiple factors that contribute to low immunization rates among pediatric transplant candidates. New tools are needed to overcome these barriers and increase immunization rates in transplant candidates.

The Impact of Online Media on Parents' Attitudes toward Vaccination of Children-Social Marketing and Public Health

The aim of this paper was to investigate the level of influence of online media on the parents' attitudes toward vaccination of children in three countries of the Western Balkans-Montenegro, Serbia, and Bosnia and Herzegovina, in order to use the potentials of this form of communication effectively and efficiently. Online media are a critical factor of influence on the formation of attitudes in many areas of modern society, which is why their proper use plays an important role in strengthening vaccine confidence and which may further contribute to improvement of public health. On the other side, having in mind the fact that communication is an integral part of marketing, it is clear that social marketing has an extremely important role regarding the analyzed topic, especially because of the fact that social marketing activities tend to change or maintain people's behavior for the benefit of individuals and society as a whole. For the purpose of this research, a conceptual model was developed. Quantitative research was conducted online in the first quarter of 2020 using the survey method. Statistical analysis was applied to data collected from 1593 parents in the analyzed countries. The relevance of the hypotheses was tested using standard statistical tests, ANOVA test, eta coefficient, and logistic regression. The research showed that all analyzed variables from the model have a significant impact on the parents' attitudes toward the vaccination of children and that they correlate with the degree of trust in vaccines. The results also approved that online media have a significant influence on the formation of parents' attitudes toward the vaccination of children (obtained values of eta coefficient η2 = 0.216, η2 = 0.18, η2 = 0.167, η2 = 0.090, reliability Cronbach's Alpha 0.892), which confirms the importance of the use of social marketing in order to direct communication properly and to strengthen the level of trust in vaccines. Additionally, the results of logistic regression showed that the following groups of parents are particularly vulnerable to the influence of online media on attitudes toward vaccines: women, parents of younger age ("millennials"), and parents who are in common law marriage, as well as parents who have more children. In addition, the results showed that there is no statistically significant difference in the attitudes of parents in the observed countries (η2 = 0.000, F = 0.85). Based on the results of the research, the authors suggest that decision makers should pay more attention to modern forms of online communication and social marketing in order to use their potential for improvement of public health, as well as avoid the harmful impact that certain forms of communication may have on the formation of attitudes and loss of confidence in vaccines. The findings provide an important contribution for public health policy makers to identify and understand properly the impact of online media and social marketing and thus to better adapt their initiatives to changes in modern society.

Maternal Satisfaction towards Childhood Immunization Service and Its Associated Factors in Wadla District, North Wollo, Ethiopia, 2019

Background. Maternal satisfaction is considered one of the most frequently used indicators to measure the quality and efficiency of childhood immunization service. Evaluating maternal satisfaction towards childhood immunization service is very relevant as it likely affects the clinical and revisit adherence, service quality, and its coverage. In countries like Ethiopia, where childhood immunization coverage is below average (39%) with low maternal satisfaction on the service, identifying factors associated with maternal satisfaction is very critical. Despite the acknowledgement made on the importance of maternal satisfaction for the successful provision of child immunization services, there is limited knowledge in Ethiopia on its contributing factors. Objective. The aim of this study was to assess maternal satisfaction towards childhood immunization service and its associated factors among mothers’ having children aged less than 1 year in Wadla district, North Wollo, Ethiopia, 2019. Methods. A community-based cross-sectional study was conducted among 682 mothers from March to April 2019 in Wadla district, North Wollo, Ethiopia. A two-stage cluster sampling technique was used to select households of the study participants. A pretested interviewer-administered structured questionnaire was used. During the period of data collection, every questionnaire was cross-checked and the collected data were checked for completeness and consistency on a daily basis. Then, the cleaned data was coded and entered in to Epi Info software version 7.2.2.2 and exported to SPSS software version 23.0 for analysis. Bivariable and multivariable logistic regression analysies were done to identify variables having a significant association with maternal satisfaction. Variables with a p value of ≤ 0.05 and adjusted odds ratio with 95% CI were considered having a statistically significant association during multivariable logistic regression analysis. Then, the findings were presented using tables, graphs, and charts. Result. The overall proportion of maternal satisfaction towards childhood immunization service was found to be 68.2% [95%CI=64.7%−71.7%]. The finding revealed that attending secondary education [adjusted odds ratio AOR=0.26; 95%CI=0.13−0.53], being divorced [AOR=0.46; 95%CI=0.23−0.91], and having favorable attitude towards child immunization [AOR=1.58; 95%CI=1.05–2.33] were found to be significantly associated with maternal satisfaction. Furthermore, the multivariable logistic regression analysis showed that short waiting time before receiving service [AOR=1.83; 95%CI=1.21−2.79], greeting from care providers, [AOR=5.69; 95%CI=3.36−9.65], having information about the current vaccine [AOR=2.03; 95%CI=1.25−3.32], dose of vaccine [AOR=2.24; 95%CI=1.40−3.58], and next immunization schedule [AOR=3.21; 95%CI=1.70−6.04] were also significantly associated with maternal satisfaction towards childhood immunization services. Conclusion and Recommendation. Generally, the study showed that more than two-thirds of the mothers were satisfied by the immunization service rendered. The level of satisfaction was higher with respect to the health workers’ relationship, communication, and immunization system aspects. However, more efforts need to be put towards improving the service waiting time for immunization, and provision of health information and communication is also recommended to enhance the level of favorable attitude among mothers towards childhood immunization services.

Perceived Benefit of Immunization-Trained Technicians in the Pharmacy Workflow

Clinical community pharmacists have continually restructured their workflow to serve the community by optimizing patient care outcomes. Defining the perceived benefits of having an immunizing pharmacy technician in the workflow can help to redefine the way community pharmacists operate during patient immunization. The purpose of this study is to share the opinions of supervising pharmacists that have an immunizing technician within their workflow model and highlight their contributions. Pharmacists involved in this novel workflow model were interviewed two times, once in 2017 and then in 2020, to gauge opinions over time. Findings in the results of this study included such themes as: (1) Pharmacists’ perceived improvement in workflow flexibility; (2) The choice of the correct technician to immunize within the pharmacy; (3) Pharmacists’ perceived improved workflow time prioritization; (4) Limited available training as a barrier to implementation; and (5) The initial apprehension and later acceptance of pharmacists with respect to the innovation. As technician immunization administration spreads beyond early adopter states, further research into the impact on pharmacy workflow is needed.

Under-immunization of pediatric transplant recipients: a call to action for the pediatric community

Vaccine-preventable infections (VPIs) are a common and serious complication following transplantation. One in six pediatric solid organ transplant recipients is hospitalized with a VPI in the first 5 years following transplant and these hospitalizations result in significant morbidity, mortality, graft injury, and cost. Immunizations are a minimally invasive, cost-effective approach to reducing the incidence of VPIs. Despite published recommendations for transplant candidates to receive all age-appropriate immunizations, under-immunization remains a significant problem, with the majority of transplant recipients not up-to-date on age-appropriate immunizations at the time of transplant. This is extremely concerning as the rate for non-medical vaccine exemptions in the United States (US) is increasing, decreasing the reliability of herd immunity to protect patients undergoing transplant from VPIs. There is an urgent need to better understand barriers to vaccinating this population of high-risk children and to develop effective interventions to overcome these barriers and improve immunization rates. Strengthened national policies requiring complete age-appropriate immunization for non-emergent transplant candidates, along with improved multi-disciplinary immunization practices and tools to facilitate and ensure complete immunization delivery to this high-risk population, are needed to ensure that we do everything possible to prevent infectious complications in pediatric transplant recipients.

Parental attitudes toward bariatric surgery in adolescents with obesity

BACKGROUND

Parental underestimation of the severity and risks of their child's obesity and parents' potential implicit weight bias contribute to the reluctance to consider bariatric surgery for their adolescent children with obesity. Despite evidence for safety and efficacy of bariatric surgery in adolescents, pediatric providers may be hesitant or uncomfortable to discuss the benefits and refer patients for surgical evaluation. Understanding these barriers is an essential step toward effective long-term care in this patient population.

OBJECTIVES

We hypothesized that parental views on bariatric surgery are primarily influenced by personal experiences with bariatric surgery, their implicit bias, understanding of health risks of obesity, and counseling by pediatric providers.

SETTING

Data were collected and analyzed at an academic medical center in the United States.

METHODS

After a retrospective chart review of 192 adolescents with obesity, a telephone survey of patients' parents was conducted.

RESULTS

Parents of 71.4% of patients who received outpatient weight loss counseling had accurate recollection of that event. Only 12.8% of parents who were referred to lifestyle programs successfully enrolled. Neither prior personal exposure to bariatric surgery nor enrollment of the child in a lifestyle program increased parents' likelihood to consider bariatric surgery for their child (P = .10 and .70, respectively). Most parents (84.6%) who were counseled by their pediatric provider about bariatric surgery would consider it, compared with only 34.5% of the parents who did not receive counseling (P < .001).

CONCLUSIONS

Counseling by pediatric providers, not involvement in lifestyle programs or exposure to bariatric surgery, increased parents' willingness to consider bariatric surgery for their child. Given the current recommendations to incorporate bariatric surgery as a treatment modality in severe adolescent obesity, earlier counseling about the role of surgery by pediatric providers is essential. More detailed provider education on the current state of bariatric surgery in the treatment of severe adolescent obesity is also necessary.

HPV Vaccine Coverage among Adolescent Males in Ohio: Results of a Longitudinal Study

BACKGROUND

Human papillomavirus (HPV) vaccine has been recommended for males in the United States since 2011, yet little is known about vaccine coverage among adolescent males in Ohio. Our longitudinal study examined HPV vaccine coverage among adolescent males in Ohio and identified predictors of vaccination.

METHODS

The Buckeye Teen Health Study recruited adolescent males ages 11-16 and their parents from one urban county and nine rural counties in Ohio. We report longitudinal vaccination data on 1126 adolescent males, with baseline data from 2015-2016 and follow-up data from 2017-2018. We used multivariable Poisson regression to identify predictors of HPV vaccine initiation that occurred between baseline and follow-up.

RESULTS

At baseline, 42.4% of parents reported their sons had initiated the HPV vaccine series. Among parents whose sons were unvaccinated at baseline, 36.3% indicated initiation at follow-up. Initiation at follow-up was more common among sons who had received influenza vaccine (RR = 1.54, 95% CI = 1.08-2.18) or whose parents indicated lack of a recent visit to a doctor as the main reason for not yet vaccinating at baseline (RR = 1.41, 95% CI = 1.02-1.95). Initiation was less common among sons whose parents had an associate's degree or some college education (RR = 0.28, 95% CI = 0.46-0.99). Main reasons for not vaccinating changed from baseline to follow-up among parents of unvaccinated sons.

CONCLUSIONS

Although HPV vaccine initiation increased over time, many adolescent males in Ohio remain unvaccinated. Findings can help guide future strategies for increasing HPV vaccine coverage among this population.

Qualitative Investigation of Community Pharmacy Immunization Enhancement Program Implementation

Background: Despite widely available nonseasonal immunization services in community pharmacies, actual pharmacist-administered vaccines are not yet optimal. A flexible choice multicomponent intervention, the “We Immunize” program, was implemented in Alabama and California community pharmacies, with the goal to enhance pneumococcal and zoster immunization delivery. Limited research has been done to qualitatively understand factors influencing immunization service expansion. Objective: Explore pharmacist perceptions of the We Immunize program in terms of its acceptability, impact, and real-world feasibility, and pharmacist-perceived facilitators and barriers influencing success in immunization delivery enhancement. Methods: This practice-focused qualitative research used semistructured telephone interviews with 14 pharmacists at the completion of the 6-month intervention. Results: Major program implementation facilitators were technician inclusion, workflow changes, training and feedback, goal setting, and enhanced personal selling and marketing activities. Multiple pharmacies increased the number of delivered pneumococcal and zoster immunizations, and increased revenue. Many pharmacists felt professional image, knowledge, skills, roles, and personal satisfaction were enhanced, as were technician knowledge, skills, and roles. Program flexibility, along with multiple perceived benefits, increases the potential for success. Conclusions: The We Immunize program appears to have been viewed positively by participating pharmacists and was seen as having a beneficial impact on immunization delivery in the community pharmacies in which it was implemented.

Lessons learned from domestic and international human papillomavirus vaccination programs: a review

Since the development of the human papillomavirus vaccine, many countries have created implementation programs to bolster vaccination rates and protect their populations. Despite demonstrated efficacy with decreased human papillomavirus-related disease abroad, the vaccine's potential to prevent morbidity and mortality in the United States is not being met. The purpose of this review is to discuss strategies of both international and domestic vaccination programs, their impact on human papillomavirus-related diseases, the unique obstacles faced by the United States, and future directions for success.

A sudden onset of a pseudo-neurological syndrome after HPV-16/18 AS04-adjuvated vaccine: might it be an autoimmune/inflammatory syndrome induced by adjuvants (ASIA) presenting as a somatoform disorder?

In last centuries, vaccines reduced the incidence of several infectious diseases. In last decades, some vaccines aimed at preventing also some cancers, where viruses play a causative role. However, several adverse events have been described after vaccines, but a causal relationship has been established only in a minority of cases. Here, we describe a pseudo-neurological syndrome occurred shortly after the administration of the bivalent HPV vaccine. Some autoimmune disorders, including neurological demyelinating diseases, have been reported after HPV vaccines, but the patient showed no organic lesions. The patient was diagnosed as having a functional somatoform syndrome, which was supposed to be autoimmune/inflammatory syndrome induced by adjuvants (ASIA), seen the temporal link with vaccination and the presence of anti-phospholipid autoantibodies. Immunological mechanisms of vaccines-and of adjuvants-have not been completely elucidated yet, and although there is no evidence of statistical association with many post-vaccination events, a causal link with vaccine cannot be excluded in some individuals.

Recombinant protein subunit vaccine synthesis in microbes: a role for yeast?

Objectives

Recombinant protein subunit vaccines are formulated using protein antigens that have been synthesized in heterologous host cells. Several host cells are available for this purpose, ranging from Escherichia coli to mammalian cell lines. This article highlights the benefits of using yeast as the recombinant host.

Key findings

The yeast species, Saccharomyces cerevisiae and Pichia pastoris, have been used to optimize the functional yields of potential antigens for the development of subunit vaccines against a wide range of diseases caused by bacteria and viruses. Saccharomyces cerevisiae has also been used in the manufacture of 11 approved vaccines against hepatitis B virus and one against human papillomavirus; in both cases, the recombinant protein forms highly immunogenic virus-like particles.

Summary

Advances in our understanding of how a yeast cell responds to the metabolic load of producing recombinant proteins will allow us to identify host strains that have improved yield properties and enable the synthesis of more challenging antigens that cannot be produced in other systems. Yeasts therefore have the potential to become important host organisms for the production of recombinant antigens that can be used in the manufacture of subunit vaccines or in new vaccine development.