Childhood Vaccination Programme Research Articles

Opt-out vaccination in school and daycare: Reconciling parental authority and obligations.

An increasing vaccine hesitancy among parents, which has resulted in insufficient rates of immunization, provides reason to reconsider childhood vaccination practices. Studies suggest that parents' decision-making process concerning whether to vaccinate their child is highly influenced by cognitive biases. These biases can be utilized to increase vaccination uptake via changes in the choice context. This article considers childhood vaccination programmes, which involve children being vaccinated in school or daycare unless their parents actively 'opt out'. We suggest that such programmes reconcile parents' decisional authority and vaccination duties. First, opt-out childhood vaccination based in schools or daycare centres are not disrespectful of parental authority. Second, the programme aligns the default setting with a moral obligation to vaccinate one's child that most parents have.

Generalized tetanus complicated with Takotsubo-cardiomyopathy in a septuagenarian following a laceration injury with soil contamination – a case report

BackgroundTetanus is a clinical rarity due to the successful globally adopted childhood vaccination programme. The rising elderly population in the United Kingdom creates a subset of individuals whom are prone to develop Tetanus as they preceded this vaccination drive.Case summaryA 76 year old Caucasian lady presented with a soil contaminated laceration injury on her knee following a fall. Though she received urgent assessment and wound care, the relevance of the injury in the backdrop of her age was not appreciated and her tetanus post exposure prophylaxis was overlooked. She readmitted seeking further management 1 week later with an infected wound with Trismus and clinical features favoring Generalized tetanus. During her stay she developed Takotsubo-cardiomyopathy with congestive cardiac failure and required prolonged care in the intensive unit with mechanical ventilation and rehabilitation before being discharged home.ConclusionFirst contact physicians should have a greater appreciation of the types of injuries and at-risk individuals who are more prone to develop tetanus upon exposure to ensure early and appropriate identification. There should be greater situational awareness with regard to the elderly in view of their heightened risk of development of tetanus specially those born before the vaccination drive. Knowledge regarding post exposure prophylaxis measures for tetanus should be regularly updated using local guidance to ensure awareness, so as to despite its rarity Tetanus remains an adequately appreciated disease.

Factors associated with COVID-19 vaccination or intent to be vaccinated across three U.S. states

Objectives: Vaccine hesitancy represents an important challenge to the effective control of the COVID-19 pandemic. In prior research on seasonal influenza, childhood vaccination, and emergency vaccination programs, hesitancy has been associated with a wide range of demographic, psychological, and compliance factors.Methods: In January 2021, an online survey was distributed using the Qualtrics (Provo, UT) platform to a proportional quota sample of individuals in three states: Louisiana, New York, and Washington. Crude and adjusted risk differences and 95 % confidence intervals were calculated to describe the relationship between vaccination or intent to be vaccinated and demographic, psychological, compliance, and pandemic impact variables.Results: Of 812 respondents, 696 indicated their vaccination status or intent to be vaccinated. Sixty-six percent indicated they were vaccinated or intended to be when available (n = 457) and 34 % were not vaccinated and did not intend to be vaccinated (n = 239). In bivariate analysis, respondents who were older, male, married, white, and reported higher household incomes were more likely to be vaccinated or intend to be. Those who complied with mask wearing, social distancing, and avoided gatherings with people outside their household were also more likely to report vaccination or intention. In the multivariable model, backward elimination resulted in a model that retained sex, race, household income, and avoiding large gatherings.Conclusion: There are important demographic, behavioral, and other factors that influence vaccine acceptance. Identifying those factors is vital for targeted and effective messaging, education, and engagement to reach those most hesitant, increase vaccination coverage, and effectively address the COVID-19 pandemic.

HPV infection and vaccination: a cross-sectional study of knowledge, perception, and attitude to vaccine uptake among university students in Qatar

BackgroundHuman Papilloma Virus (HPV) infection is a significant public health concern in the Gulf Cooperation Council countries, being widely prevalent and the main risk factor for cervical cancer. We aimed to assess knowledge and perception towards HPV, acceptability of the HPV vaccine, and HPV vaccination rates among university students in Education City, Doha, Qatar.MethodsThis cross-sectional survey utilized proportional quota-sampling, with quotas based on university, sex, and nationality, to recruit students from seven universities between February and September 2022. The English language questionnaire requested socio-demographic information, knowledge, and attitudes about HPV infection and the vaccine. The chi-square test, Student t-test, Mann-Whitney-Wilcoxon tests and multivariable ordinal logistic regression were used to assess differences in proportion, mean, and median according to broad HPV knowledge categories.ResultsThree hundred and ninety-eight students were recruited (response rate = 82.3%), of whom 251 (63.1%) were female. Mean age was 21.7 years. Eighty-nine (22.4%, 95% CI 18.4–26.8%) students had poor knowledge about HPV, 220 (55.3%, 95% CI 50.2–60.2%) students had some awareness, and 89 (22.4%, 95% CI 18.4–26.8%) students were knowledgeable. Age, nationality, and field of study influenced the students’ knowledge about HPV. Only 25 (6.3%) students had previously been vaccinated against HPV. However, 71% of the unvaccinated students reported being willing to get vaccinated if recommended by their healthcare provider.ConclusionsOverall, 77.7% of the student population had some-to-good levels of knowledge about HPV-related infection, cancer, and vaccination. There are gaps in the student population’s understanding and knowledge about HPV. Increasing knowledge can be key toward shared decision-making for HPV vaccination among eligible populations. Targeted public health campaigns and integration into childhood vaccination programs should be critical first steps, especially as most of the surveyed students had a positive outlook on getting vaccinated. Healthcare professionals should be incentivized to increase their HPV knowledge and communication skills, while policymakers can work toward easing barriers in integrating HPV vaccinations in the immunization schedule and encouraging overall HPV vaccination uptake.

Vital Signs: Trends and Disparities in Childhood Vaccination Coverage by Vaccines for Children Program Eligibility - National Immunization Survey-Child, United States, 2012-2022.

The Vaccines for Children (VFC) program was established in 1994 to provide recommended vaccines at no cost to eligible children and help ensure that all U.S. children are protected from life-threatening vaccine-preventable diseases. CDC analyzed data from the 2012-2022 National Immunization Survey-Child (NIS-Child) to assess trends in vaccination coverage with ≥1 dose of measles, mumps, and rubella vaccine (MMR), 2-3 doses of rotavirus vaccine, and a combined 7-vaccine series, by VFC program eligibility status, and to examine differences in coverage among VFC-eligible children by sociodemographic characteristics. VFC eligibility was defined as meeting at least one of the following criteria: 1) American Indian or Alaska Native; 2) insured by Medicaid, Indian Health Service (IHS), or uninsured; or 3) ever received at least one vaccination at an IHS-operated center, Tribal health center, or urban Indian health care facility. Overall, approximately 52.2% of U.S. children were VFC eligible. Among VFC-eligible children born during 2011-2020, coverage by age 24 months was stable for ≥1 MMR dose (88.0%-89.9%) and the combined 7-vaccine series (61.4%-65.3%). Rotavirus vaccination coverage by age 8 months was 64.8%-71.1%, increasing by an average of 0.7 percentage points annually. Among all children born in 2020, coverage was 3.8 (≥1 MMR dose), 11.5 (2-3 doses of rotavirus vaccine), and 13.8 (combined 7-vaccine series) percentage points lower among VFC-eligible than among non-VFC-eligible children. Although the VFC program has played a vital role in increasing and maintaining high levels of childhood vaccination coverage for 30 years, gaps remain. Enhanced efforts must ensure that parents and guardians of VFC-eligible children are aware of, have confidence in, and are able to obtain all recommended vaccines for their children.

Impact of COVID-19 on vaccine confidence and uptake: A systematic literature review

ABSTRACT During the coronavirus disease 2019 (COVID-19) pandemic, scheduled vaccinations were postponed, mass vaccination programmes were suspended and opportunities for healthcare workers to administer vaccines ad hoc decreased. The aims of this systematic literature review were to determine the impact of the COVID-19 pandemic on vaccine confidence, intent and uptake in preexisting routine childhood or adult vaccination programmes, and to identify factors associated with changes in acceptance, intent and uptake of preexisting vaccines. Medline and Embase were searched for studies in Australia, Brazil, Canada, China, Japan, the USA, and European countries, published between 1 January 2021 and 4 August 2022. A complementary gray literature search was conducted between 11 and 13 October 2022, and supplemented with additional gray research in October 2023. In total, 54 citations were included in the review. Study design and geography were heterogeneous. The number of adults who received or intended to receive an influenza or pneumococcal vaccine was higher during the pandemic than in previous seasons (n = 28 studies). In addition, increased acceptance of adult vaccinations was observed during 2020–21 compared with 2019–20 (n = 12 studies). The rates of childhood vaccinations decreased during the COVID-19 pandemic across several countries (n = 11 studies). Factors associated with changes in intention to receive a vaccination, or uptake of influenza vaccine, included previous vaccination, older age, higher perceived risk of contracting COVID-19, anxiety regarding the pandemic and fear of contracting COVID-19. Acceptance and uptake of influenza and pneumococcal vaccines generally increased after onset of the COVID-19 pandemic.

“I can't see the forest for the ticks, uhm, trees …”: The role of online forums in parents' vaccination trajectories

When it comes to health-related information-seeking behavior, online communities play a key role for some groups, such as parents. With a case study of online communities in a loosely organized vaccination system, that of Austria, we study how parents make use of a prominent online forum (parents.at) in their vaccination trajectories and situate this analysis in its socio-political context. Based on inductive qualitative analysis of relevant threads (n = 27), we find that parents use forums in three ways: First, the forum serves as a platform through which parents seek orientation in a loosely organized and fragmented vaccination system. Second, the forum offers space for sharing, collecting, and evaluating different forms of expertise. In doing so, parents carve out a space in which they can comfortably put lay expertise and credentialed expertise on a par, particularly in their advice to peers. Third, and on that basis, parents use the forum for deliberating on future or past vaccination-related decisions. In doing so, they frequently draw on idiosyncratic notions of individual risks and benefits. These three practices enable parents to accumulate and share what we label navigational capital. We conclude that parents resort to online spaces both out of a subjective need and, for some, as a result of a dysfunction of the national childhood vaccination program which offers little orientation for parents.

Determinants of Parental Vaccine Hesitancy During the COVID-19 Era in Saudi Arabia: A Cross-Sectional Survey.

Background Despite the success of childhood vaccination in reducing vaccine-preventable diseases (VPDs), vaccine hesitancy remains a significant challenge in several countries, such as Saudi Arabia, both during and beyond the COVID-19 era. Furthermore, the pandemic may have impacted vaccine hesitancy trends, potentially affecting parents' intentions to adhere to scheduled childhood vaccination programs. Aim This article aims to assess the extent of parents' hesitancy towardchildhood vaccination, determine if it increased or decreased due to the COVID-19 pandemic, highlight the factors and determinants that influenced this hesitancy, whether positively or negatively, during the COVID-19 era, andestimate the acceptance of COVID-19 vaccination in relation to the acceptance of scheduled childhood vaccination. Methods A cross-sectional study was conducted in Saudi Arabia through a snowball sampling technique. Data were collected between September 2022 and October 2022 using an online survey using Google Forms. The inclusion criteria were parents or guardians in Saudi Arabia with a child up to 18 years of age.Responses were analyzed using SPSS V25 (IBM Corp., Armonk, NY, US), with chi-square tests and logistic regression performed to compare hesitancy and vaccination status. Results Among the 1,209 parents and care providers who participated, the prevalence of parents' vaccine hesitancy was 374 (30.9%). The educational level of the parents was not significantly associated with hesitancy status (p 0.490). The most refused vaccine was Mpox (345; 28.5%), whereas the one that caused the most hesitancy was the COVID-19 vaccine (352; 29.1%). Regarding the parents' concerns, the main reason for their hesitancy was the influence of their negative perceptions from social media content, including false or misleading information and negative allegations about vaccines, reported by 449 (18.98%) of the participants. Logistic regression analysis indicated that negative social media perceptions significantly increased the likelihood of vaccine hesitancy (OR = 2.15, 95% CI = 1.78-2.60, p < 0.001). Conclusion Our study highlights the prevalence of parental vaccine hesitancy during the COVID-19 era; the most significant hesitancy was observed towardthe COVID-19 vaccine, and the mpox vaccine was the most rejected. Negative social media was the main reason for parental hesitancy; public health efforts should focus on providing accurate and easily accessible information through educational campaigns on social media and other platforms.

Analysis of the implementation effect and evaluation of the vaccine protection effect of the live attenuated varicella vaccine program for school-age children in Bao’an district of Shenzhen,China

ABSTRACT The objective of the study is to analyze the implementation effect of the Live Attenuated Varicella Vaccine (VarV) Vaccination Program for eligible children in Bao’an District, Shenzhen, and evaluate the vaccine effectiveness. Children’s vaccination data was obtained from the Shenzhen Immunization Planning Information Management System, while varicella case data came from the China Disease Prevention and Control Information System. The Joinpoint regression method examined vaccination rate trends, and a retrospective cohort study assessed vaccine effectiveness. After program implementation, VarV vaccination rates significantly increased, surpassing provincial and national averages. Overall incidence declined 54.6% across age groups, with the largest reductions among 7- and 6-year-olds. One year post-vaccination, single-dose vaccine effectiveness was 91.1% (95% CI: 79.2% to 96.2%). However, two doses remained 91.4% effective(95% CI: 89.1% to 93.2%) after 7 years. Overall, Shenzhen’s VarV program achieved positive results. For children under six, routine immunization with two doses of VarV should be strengthened. Furthermore, we recommend that physicians conduct thorough inquiries to ascertain patients’ vaccination history and previous varicella infections. This will enable doctors to provide tailored vaccination recommendations based on comprehensive, practical evaluations.

Comprehensive periodic health evaluations of 454 Norwegian Paralympic and Olympic athletes over 8 years: what did we learn?

ObjectiveA periodic health evaluation (PHE) is a comprehensive and multidisciplinary investigation of athlete health widely used in elite sport, but its contents and benefits can be questioned. This study aimed...

The Evaluation of human papillomavirus vaccination coverage for school aged girls in Badung District, Bali, Indonesia, 2016 – 2018

Background and purpose: Since 2016, Badung District, Bali has implemented a free HPV vaccination program for school children, with vaccination coverage reported to be over 90% in 2016-2018. This study aims to objectively assess the coverage of HPV vaccination among school children in Badung District. Methods: This survey used a cross-sectional design that conducted between March and June 2019. Sample selection was done by systematic random sampling, following the WHO guidelines. A total of 216 families met the sample criteria, with a total of 249 children from all families. Respondents in this study were eligible girls' mothers or families who knew the child's vaccination history. Variables of this study were sociodemographic characteristics of respondents and children, HPV vaccination recall and HPV child vaccination validation. The data collected were analyzed descriptively to calculate the coverage of recall and validation of HPV vaccination. Results: The majority of respondents were mothers (70.83%) with a high school education (51.85%). The median age was 43 years (IQR=8 years). Each family had a mean of 1.15 eligible children (SD=0.39). Of the 249 children, most were aged 16-19 years (43.37%), with age at vaccination mostly ≤12 years (46.52%). HPV vaccination coverage by recall was 82.32% (95%CI: 77.56-87.09), with HPV vaccination coverage by validation was 76.59% (95%CI: 70.74-82.43). Conclusion: After validation, vaccination coverage was lower than vaccination coverage by recall. The health office needs to improve the vaccination registration system, in particular the uniformity of registration and record keeping to ensure proper traceability of vaccination history.

Physicians’ perspectives on COVID-19 vaccinations for children: a qualitative exploration in Ontario, Canada

ObjectivesParents’ decisions to vaccinate their children against COVID-19 are complex and often informed by discussions with primary care physicians. However, little is known about physicians’ perspectives on COVID-19 vaccinations for...

Health service providers' views on barriers and drivers to childhood vaccination of FDMN/Rohingya refugees: a qualitative study in Cox's Bazar, Bangladesh.

Despite established vaccination programs, vaccine-preventable diseases persist among about 900,000 Forcibly Displaced Myanmar Nationals (FDMN)/Rohingya refugees in the world's largest refugee settlement in Bangladesh. Health service providers (HSPs) play a key role in the delivery of childhood vaccination programs. This study explored their views on individual and context barriers and drivers to childhood vaccination in this setting. Informed by the theoretical framework of the Capability-Opportunity-Motivation-Behavior (COM-B) model for behavior change, this qualitative study collected data through eight focus group discussions (FGDs) with community health workers (CHWs) and vaccinators in selected camps with high or low vaccination coverage rates, and through 11 in-depth interviews (IDIs) with key informants working in strategic, management, and administrative roles. Barriers and drivers were evident across all COM factors for HSPs and caregivers. Among HSPs, knowledge around vaccination acted both as a barrier and driver, while communication skills and confidence in vaccination served as drivers. Caregivers' lack of awareness of vaccination, concerns and mistrust were described as main barriers. Context barriers included information system deficiencies, family dynamics, HSPs' working conditions, and vaccination site accessibility. Context drivers included effective communication, mobilization, and incentives. Differences between high and low coverage camps in Cox's Bazar included variations in HSPs' knowledge, communication strategies, incentive use, and stakeholder collaboration. For better vaccination coverage in the camps, context-related changes regarding collaboration, health workforce and the use of incentives seem necessary. Caregivers' mistrust toward vaccination needs to be considered under the social and historical background of the Rohingya community, and further addressed with targeted communication and campaigning.

Childhood vaccinations and the demand for children: Long-term evidence from India

Childhood vaccinations can increase population growth in the short term by improving the survival rates of young children. Over the long run, reductions in child mortality rates are associated with lower demand for children and lower fertility rates (known as “demographic transition”). Vaccination programs could potentially aid demographic transition by lowering child mortality and improving future health, schooling, and labor market outcomes of vaccinated mothers, but these long-term demographic benefits remain untested. We address this major gap in the literature by examining the associations of India’s national childhood vaccination program (the Universal Immunization Programme or UIP) with future demand for children. We combine data on the district-wise rollout of UIP during 1985–1990 with fertility preference data of 625,000 adult women from the National Family Health Survey of India 2015–2016. We include women who were born five years before and after the rollout period (1980–1995) and were cohabiting with a partner at the time of the survey. We divide these 20–36-year-old women into two groups: those who were exposed to UIP at birth (treatment group) and those who were born before the program (control group). After controlling for individual- and household-level factors and age and district fixed effects, treatment group women are 2% less likely to have at least one child and want 2% fewer children in their lifetime as compared with the control group. The negative associations with at least one childbirth are larger for more educated and richer women, while the associations with desired number of children is larger for uneducated and poorer women.

Struggling to resume childhood vaccination during war in Myanmar: evaluation of a pilot program

BackgroundAfter the military coup in Myanmar in February 2021, the health system began to disintegrate when staff who called for the restoration of the democratic government resigned and fled to states controlled by ethnic minorities. The military retaliated by blocking the shipment of humanitarian aid, including vaccines, and attacked the ethnic states. After two years without vaccines for their children, parents urged a nurse-led civil society organization in an ethnic state to find a way to resume vaccination. The nurses developed a vaccination program, which we evaluated.MethodsA retrospective cohort study and participatory evaluation were conducted. We interviewed the healthcare workers about vaccine acquisition, transportation, and administration and assessed compliance with WHO-recommended practices. We analyzed the participating children’s characteristics. We calculated the proportion of children vaccinated before and after the program. We calculated the probability children would become up-to-date after the program using inverse survival.ResultsSince United Nations agencies could not assist, private donations were raised to purchase, smuggle into Myanmar, and administer five vaccines. Cold chain standards were maintained. Compliance with other WHO-recommended vaccination practices was 74%. Of the 184 participating children, 145 (79%, median age five months [IQR 6.5]) were previously unvaccinated, and 71 (41%) were internally displaced. During five monthly sessions, the probability that age-eligible zero-dose children would receive the recommended number of doses of MMR was 92% (95% confidence interval [CI] 83–100%), Penta 87% (95% CI 80%–94%); BCG 76% (95% CI 69%–83%); and OPV 68% (95% CI 59%–78%). Migration of internally displaced children and stockouts of vaccines were the primary factors responsible for decreased coverage.ConclusionsThis is the first study to describe the situation, barriers, and outcomes of a childhood vaccination program in one of the many conflict-affected states since the coup in Myanmar. Even though the proportion of previously unvaccinated children was large, the program was successful. While the target population was necessarily small, the program’s success led to a donor-funded expansion to 2,000 children. Without renewed efforts, the proportion of unvaccinated children in other parts of Myanmar will approach 100%.

Considerations, challenges and gaps on mandatory childhood vaccination programs: A comprehensive analysis

Childhood vaccine coverage rates are not optimal for controlling vaccine-preventable diseases (VPDs), as outbreaks of VPDs occur from time to time globally. To address this gap, many countries have enacted and strengthened childhood vaccination programs, which are often mandatory. Mandatory vaccination programs are often controversial because they may reduce or eliminate individual choice. A standard approach for evaluating the mandatory vaccination program is not available. Vaccine types, target age groups, program rigidity, incentives or penalties, enforcement, and compensation mechanism for adverse events following immunization vary across the world. This article reviewed the mandatory childhood vaccination, and presented examples to illustrate the variations among different programs, outcomes, and key considerations when contemplating these programs. Before implementing mandatory childhood vaccination programs, it is critical to ensure financial sustainability, a steady supply of vaccines, equitable access for all target population, and tailored implementation to fit the local culture and context.

Childhood vaccination trends during 2019 to 2022 in Tanzania and the impact of the COVID-19 pandemic

ABSTRACT The COVID-19 pandemic has significantly disrupted healthcare systems at all levels globally, notably affecting routine healthcare services, such as childhood vaccination. This study examined the impact of these disruptions on routine childhood vaccination programmes in Tanzania. We conducted a longitudinal study over four years in five Tanzanian regions: Mwanza, Dar es Salaam, Mtwara, Arusha, and Dodoma. This study analyzed the trends in the use of six essential vaccines: Bacille Calmette-Guérin (BCG), bivalent Oral Polio Vaccine (bOPV), Diphtheria Tetanus Pertussis, Hepatitis-B and Hib (DTP-HepB-Hib), measles-rubella (MR), Pneumococcal Conjugate Vaccine (PCV), and Rota vaccines. We evaluated annual and monthly vaccination trends using time-series and regression analyses. Predictive modeling was performed using an autoregressive integrated moving average (ARIMA) model. A total of 32,602,734 vaccination events were recorded across the regions from 2019 to 2022. Despite declining vaccination rates in 2020, there was a notable rebound in 2021, indicating the resilience of Tanzania’s immunization program. The analysis also highlighted regional differences in vaccination rates when standardized per 1000 people. Seasonal fluctuations were observed in monthly vaccination rates, with BCG showing the most stable trend. Predictive modeling of BCG indicated stable and increasing vaccination coverage by 2023. These findings underscore the robustness of Tanzania’s childhood immunization infrastructure in overcoming the challenges posed by the COVID-19 pandemic, as indicated by the strong recovery of vaccination rates post-2020. We provide valuable insights into the dynamics of vaccination during a global health crisis and highlight the importance of sustained immunization efforts to maintain public health.

Investigating The Importance of Vaccines and Childhood Nutrition on Improving Maternal and Child Health

T Maternal and child health remains a critical global concern, with significant efforts directed towards improving outcomes. This paper undertakes a comprehensive review to elucidate the pivotal roles of vaccines and childhood nutrition in enhancing maternal and child health. Vaccines are recognized as one of the most effective public health interventions, substantially reducing the burden of infectious diseases among both mothers and children. Through immunization, mothers are safeguarded against potentially life-threatening infections during pregnancy, consequently reducing maternal morbidity and mortality rates. Additionally, childhood vaccination programs play a crucial role in preventing various communicable diseases, thereby ensuring the well-being of infants and young children. Concomitantly, childhood nutrition emerges as a cornerstone of maternal and child health. Adequate nutrition during pregnancy is paramount for fetal development and maternal well-being, mitigating the risks of complications such as low birth weight and preterm birth. Furthermore, early childhood nutrition profoundly influences growth, cognitive development, and immune function, laying the foundation for optimal health outcomes throughout life. Addressing malnutrition in all its forms is imperative, encompassing not only undernutrition but also the rising challenges of overweight and obesity, which pose significant health risks. Moreover, the synergistic effects of vaccines and proper nutrition are evident in promoting maternal and child health. Immunization efficacy can be augmented by ensuring adequate nutritional status, as malnutrition can compromise immune responses and vaccine effectiveness. Conversely, vaccines protect against infectious diseases that can exacerbate malnutrition, thus fostering a positive cycle of health improvement. However, challenges such as vaccine hesitancy, inadequate healthcare infrastructure, and socioeconomic disparities persist, hindering the full realization of these interventions' potential.

Missed opportunities for human papillomavirus vaccination using Iowa's Immunization Registry Information System.

Adolescent human papillomavirus (HPV) vaccination rates continue to remain lower than other adolescent vaccines, both nationwide and in Iowa. This study examined predictors of missed opportunities for first-dose HPV vaccine administrations in Iowa in order to conduct more targeted outreach and improve adolescent HPV vaccine uptake. A retrospective study was conducted to identify predictors of missed opportunities for first-dose HPV vaccination in Iowa adolescents using Iowa's Immunization Registry Information System. The study population included 154,905 adolescents aged 11-15 years between 2019 and 2022. Missed opportunity for first-dose HPV vaccination was defined as a vaccination encounter where an adolescent received a Tdap and/or MenACWY vaccine but did not receive the first-dose HPV vaccine during the same encounter. Over a third of the study population experienced a missed opportunity for HPV vaccination between 2019 and 2022. Missed opportunity for vaccination was most common among individuals living in a rural county (aOR = 1.36), underinsured adolescents (aOR = 1.74), males (aOR = 1.12), teens 13-15 years of age (aOR = 1.76), and White race and non-Hispanic ethnicity. This study builds on previously reported predictors of missed opportunity for HPV vaccination in adolescents. Increased understanding of provider needs and barriers to administering HPV vaccination and further analysis of how the Vaccines for Children Program can play a role in HPV vaccination uptake is necessary to improve HPV vaccination rates among adolescents in Iowa and more specifically in rural communities.

The impact of quality-adjusted life years on evaluating COVID-19 mitigation strategies: lessons from age-specific vaccination roll-out and variants of concern in Belgium (2020-2022)

BackgroundWhen formulating and evaluating COVID-19 vaccination strategies, an emphasis has been placed on preventing severe disease that overburdens healthcare systems and leads to mortality. However, more conventional outcomes such as quality-adjusted life years (QALYs) and inequality indicators are warranted as additional information for policymakers.MethodsWe adopted a mathematical transmission model to describe the infectious disease dynamics of SARS-COV-2, including disease mortality and morbidity, and to evaluate (non)pharmaceutical interventions. Therefore, we considered temporal immunity levels, together with the distinct transmissibility of variants of concern (VOCs) and their corresponding vaccine effectiveness. We included both general and age-specific characteristics related to SARS-CoV-2 vaccination. Our scenario study is informed by data from Belgium, focusing on the period from August 2021 until February 2022, when vaccination for children aged 5-11 years was initially not yet licensed and first booster doses were administered to adults. More specifically, we investigated the potential impact of an earlier vaccination programme for children and increased or reduced historical adult booster dose uptake.ResultsThrough simulations, we demonstrate that increasing vaccine uptake in children aged 5-11 years in August–September 2021 could have led to reduced disease incidence and ICU occupancy, which was an essential indicator for implementing non-pharmaceutical interventions and maintaining healthcare system functionality. However, an enhanced booster dose regimen for adults from November 2021 onward could have resulted in more substantial cumulative QALY gains, particularly through the prevention of elevated levels of infection and disease incidence associated with the emergence of Omicron VOC. In both scenarios, the need for non-pharmaceutical interventions could have decreased, potentially boosting economic activity and mental well-being.ConclusionsWhen calculating the impact of measures to mitigate disease spread in terms of life years lost due to COVID-19 mortality, we highlight the impact of COVID-19 on the health-related quality of life of survivors. Our study underscores that disease-related morbidity could constitute a significant part of the overall health burden. Our quantitative findings depend on the specific setup of the interventions under review, which is open to debate or should be contextualised within future situations.