A behavior change model to address caregiver hesitancy around COVID-19 vaccination in pediatrics

IntroductionMany families express hesitancy around immunizing their children against COVID-19. We sought to better understand the perspectives of vaccine hesitant caregivers, and develop targeted recommendations for health care workers and policymakers to engage in more effective vaccine discussions.MethodsWe conducted semi-structured telephone interviews with 23 caregivers recruited from a pediatric infectious diseases clinic, including a subset of patients referred to discuss vaccine hesitancy. Thematic analysis of the interviews identified themes that were mapped using behavior change models to identify perceived barriers and facilitators towards COVID-19 immunization.ResultsBarriers and facilitators were mapped to the WHO (World Health Organization) 3C’s (confidence, complacency, convenience) model of vaccine hesitancy as well as the COM-B (capability, opportunity, motivation) behavior change model. Barriers included mistrust in authorities, misperception of the risk of COVID-19 in children, and perceived health contraindications and negative previous vaccine experiences. Facilitators included positive relationships with healthcare workers, the promise of a “return to normal”, and societal pressures to immunize.ConclusionsEfforts to increase vaccine uptake in the pediatric population must target specific barriers and facilitators to immunization expressed by caregivers. To address these concerns, we suggest: 1. Educating hesitant caregivers by highlighting the long-term pandemic effects on children and the threat of COVID-19 to children’s health, 2. Building on the trust caregivers have in healthcare workers by involving frontline workers in public health policy, and 3. Harnessing the power of peer pressure by mobilization of societal pressures and establishing COVID-19 vaccination as the norm in children.     

Factors associated with caregivers’ hesitancy to vaccinate children against influenza: A cross-sectional survey in China

BackgroundSeasonal influenza can cause serious harm to children under five years of age, while caregivers are still hesitant to vaccinate children against influenza. This study aimed to investigate caregivers’ hesitancy regarding influenza vaccination and assess the associated factors.MethodsFrom August to October 2019, a cross-sectional survey was conducted in ten provinces in China. The questionnaire collected information about sociodemographic characteristics and caregivers’ knowledge, perceptions and attitudes toward influenza vaccination. Caregivers were identified as not hesitating, hesitating or refusing to vaccinate children. Multinomial logistic regression was adopted to determine factors related to vaccine hesitancy based on the 3C model with three dimensions namely complacency, convenience and confidence.ResultsA total of 6668 valid questionnaires were collected, among which 38.57% did not hesitate to vaccinate children against influenza, 56.03% were hesitant, and 5.40% refused. Multinomial logistic regression showed that caregivers perceiving high importance (AOR = 0.68 for hesitancy; 0.15 for refusal), safety (AOR = 0.42; 0.46) or efficacy (AOR = 0.73; 0.65) of influenza vaccination, knowing children as a priority group (AOR = 0.80; 0.48), and trusting vaccination advice from medical staff (AOR = 0.65; 0.51) had lower odds of hesitancy or refusal. Those considering price as a hindering factor had higher odds of hesitancy (AOR = 1.66) or refusal (AOR = 1.47), and those viewing time or distance as a hindering factor (AOR = 1.45) or having heard of vaccine-related negative information (AOR = 1.78) had higher odds of hesitancy. Sociodemographic characteristics were associated with vaccine hesitancy or refusal, and the associations varied for hesitators and refusers.ConclusionA large proportion of caregivers in China reported their hesitancy for influenza vaccination, and the associated factors of such hesitancy were complicated. Health professionals are recommended to spread relevant scientific knowledge and give vaccine-related suggestions to caregivers in doctor visits to promote caregivers’ trust in influenza vaccination and therefore expand childhood vaccine coverage.     

The determinants of vaccine hesitancy in China: A cross-sectional study following the Changchun Changsheng vaccine incident

IntroductionVaccine hesitancy is cited as one of the top threats to global health. The Changchun Changsheng Biotechnology Company was found to have violated good manufacturing practices in July 2018, leading to widespread distribution of sub-potent vaccines in China. We estimated the prevalence and determinants of vaccine hesitancy following the Changchun Changsheng vaccine incident (CCVI).MethodsWe conducted a cross-sectional survey in China in January 2019, and 2,124 caregivers of children < 6 years old completed self-administered questionnaires. Multinomial logistic regression was used to assess the determinants of vaccine hesitancy; the potential determinants included demographics, socioeconomic status, vaccine confidence, and knowledge of the CCVI. Adjusted Odds Ratios (AORs) and 95% confidence intervals (CI) are reported.ResultsAround 89% of caregivers had heard of the CCVI. Although 83% and 88% of caregivers agreed that vaccines are safe and effective, respectively, 60% expressed some hesitancy about vaccination. Of those hesitant, 26% vaccinated their children at times with doubts, 31% delayed vaccination and 3% refused specific vaccines. Multinomial regression analysis showed that confidence in vaccine safety was associated with a reduced odds of doubts on vaccination (AOR = 0.64; 95%CI = 0.44–0.94), whereas caregivers who had heard of the CCVI had a significantly higher odds of doubts on vaccination (AOR = 1.61; 95%CI = 1.05–2.45). Confidence in the vaccine delivery system and government were associated with a lower odds of vaccine hesitancy. Caregivers with higher education and Buddhism or other religions were significantly more hesitant to vaccinate their children.ConclusionVaccine hesitancy was prevalent following the CCVI. Over half the caregivers either accepted childhood vaccination with doubts or delayed vaccines; only a small number were active refusers. Our findings highlight the importance of addressing vaccine hesitancy, especially following vaccine incidents. Tailored communications are needed to reduce vaccine hesitancy, especially among the highly educated and Buddhist caregivers.     

Educational videos to address vaccine hesitancy in childhood immunization

BackgroundAs one of the essential programs that have been developed for decades, childhood immunizations are mandatory to protect children from vaccine-preventable diseases. Despite its availability and accessibility, immunization coverage has not reached the intended goals. Vaccine hesitancy and COVID-19 pandemic may threaten immunization coverage in children. This study aimed to evaluate the tailored educational videos to reduce vaccine hesitancy and analyze the changes in childhood routine immunization status.MethodsThis was an interventional quasi-experimental study in three subdistricts of North Jakarta, Indonesia. Participants were allocated into educational videos exposures (intervention group, n = 116) or to the digital version of the maternal and child health handbook (control group, n = 104). We administered a pre- and post-intervention vaccine hesitancy survey using the Parent Attitudes about Childhood Vaccines (PACV) questionnaire with cut-off scores of 50.ResultsA total of 220 parents were recruited in this study from June 18, 2021, to December 10, 2021. The pre-intervention PACV survey showed that 19 (8.6%) parents were vaccine-hesitant from both groups: 12 (10.3%) and 7 (6.7%) of parents among intervention and control groups. After the interventions, there were 8 (6.9%) and 8 (7.7%) vaccine-hesitant parents in the intervention and control groups, respectively. We found a significant difference in the post-intervention PACV median score between the intervention and control groups (17 vs 23; p = 0.035). Around 25% of parents have not completed their children’s immunization status: 22.4% and 28.8% in the intervention and control groups, respectively. There was a significant difference between the proportion of PACV hesitancy on the immunization status within intervention and control groups (p = 0.001).ConclusionThere was a reduction in vaccine hesitancy after interventions. Educational videos intervention distributed through WhatsApp group was associated with lower vaccine hesitancy and can be used as health education tools among Indonesian parents in the community.     

Insights into vaccine hesitancy from systems thinking,Rwanda

ObjectiveTo investigate vaccine hesitancy leading to underimmunization and a measles outbreak in Rwanda and to develop a conceptual, community-level model of behavioural factors.MethodsLocal immunization systems in two Rwandan communities (one recently experienced a measles outbreak) were explored using systems thinking, human-centred design and behavioural frameworks. Data were collected between 2018 and 2020 from: discussions with 11 vaccination service providers (i.e. hospital and health centre staff); interviews with 161 children’s caregivers at health centres; and nine validation interviews with health centre staff. Factors influencing vaccine hesitancy were categorized using the 3Cs framework: confidence, complacency and convenience. A conceptual model of vaccine hesitancy mechanisms with feedback loops was developed.FindingsA comparison of service providers’ and caregivers’ perspectives in both rural and peri-urban settings showed that similar factors strengthened vaccine uptake: (i) high trust in vaccines and service providers based on personal relationships with health centre staff; (ii) the connecting role of community health workers; and (iii) a strong sense of community. Factors identified as increasing vaccine hesitancy (e.g. service accessibility and inadequate follow-up) differed between service providers and caregivers and between settings. The conceptual model could be used to explain drivers of the recent measles outbreak and to guide interventions designed to increase vaccine uptake.ConclusionThe application of behavioural frameworks and systems thinking revealed vaccine hesitancy mechanisms in Rwandan communities that demonstrate the interrelationship between immunization services and caregivers’ vaccination behaviour. Confidence-building social structures and context-dependent challenges that affect vaccine uptake were also identified.     

Parental attitudes in the pediatric emergency department about the COVID-19 vaccine

BackgroundCOVID-19 vaccinations are now recommended in the United States (U.S.) for children ≥ 6 months old. However, pediatric vaccination rates remain low, particularly in the Hispanic/Latinx population.ObjectiveUsing the 4C vaccine hesitancy framework (calculation, complacency, confidence, convenience), we examined parental attitudes in the emergency department (ED) towards COVID-19 vaccination, identified dimensions of parental vaccine hesitancy, and assessed parental willingness to have their child receive the COVID-19 vaccine.MethodsAs part of a larger multi-methods study examining influenza vaccine hesitancy, we conducted interviews that included questions about COVID-19 vaccine authorization for children. We used directed content analysis to extract qualitative themes from 3 groups of parents in the ED: Hispanic/Latinx Spanish speaking (HS), Hispanic/Latinx English speaking (HE), non-Hispanic/non-Latinx White English speaking (WE). Themes were triangulated with the Parent Attitudes about Childhood Vaccines (PACV) survey, where higher scores indicate increased vaccine hesitancy.ResultsFactors influencing vaccine hesitancy were mapped to the 4C framework from 58 sets of interviews and PACVs. HE and HS parents, compared to WE parents, had less knowledge about COVID-19 and its vaccine, and more beliefs in COVID-19 vaccine myths. However, both HS and HE parent groups were more inclined to endorse COVID-19 vaccine effectiveness as a reason to have their children vaccinated. HS parents felt that COVID-19 increased their fear of illnesses in general and were worried about confusing COVID-19 with other infections. Median PACV scores of HS (Mdn = 20) and HE (Mdn = 20) parent groups were higher than of WE parents (Mdn = 10), but parental willingness to have their child receive COVID-19 vaccination was similar across groups.ConclusionsHigher COVID-19 vaccine hesitancy among HS and HE parents compared to WE parents may be attributed to insufficient knowledge about COVID-19, its vaccine, along with COVID-19 vaccine myths. Efforts to provide targeted vaccine education to different populations is warranted.     

中国3个地区儿童家长对国家免疫规划类疫苗犹豫现状研究

目的 了解我国儿童家长对国家免疫规划类疫苗犹豫发生率和影响因素,并探索不同种类疫苗的犹豫现状。方法 在北京市通州区、四川省成都市及甘肃省白银市进行横断面调查,采用成比例概率抽样和便利抽样的方法选取符合标准的研究对象进行问卷调查。结果 共纳入研究对象3 592人,38.22%的家长完全接受所有疫苗,59.35%的家长给儿童接种了所有疫苗但表示有轻微的担忧,2.42%的儿童家长对国家免疫规划类疫苗有疫苗犹豫行为。其中家长产生疫苗犹豫最多的是脊髓灰质炎疫苗（0.89%）,其次为百白破疫苗（0.70%）和甲肝疫苗（0.64%）。疫苗犹豫产生的主要原因是对疫苗的风险效益判断（31.03%）,其次为家长的认知情况较低（21.84%）,第三为交通/时间因素带来的不便（21.84%）。结论 我国儿童家长对国家免疫规划类疫苗犹豫行为的发生率较低,但半数以上家长对疫苗持担忧态度。进一步改进我国免疫规划体系的服务质量,加强疫苗相关知识宣教,对减少疫苗犹豫是至关重要的。     

Vaccine hesitancy: Definition,scope and determinants

The SAGE Working Group on Vaccine Hesitancy concluded that vaccine hesitancy refers to delay in acceptance or refusal of vaccination despite availability of vaccination services. Vaccine hesitancy is complex and context specific, varying across time, place and vaccines. It is influenced by factors such as complacency, convenience and confidence. The Working Group retained the term ‘vaccine’ rather than ‘vaccination’ hesitancy, although the latter more correctly implies the broader range of immunization concerns, as vaccine hesitancy is the more commonly used term. While high levels of hesitancy lead to low vaccine demand, low levels of hesitancy do not necessarily mean high vaccine demand. The Vaccine Hesitancy Determinants Matrix displays the factors influencing the behavioral decision to accept, delay or reject some or all vaccines under three categories: contextual, individual and group, and vaccine/vaccination-specific influences.     

Vaccine hesitancy in Argentina: Validation of WHO scale for parents

BackgroundThe WHO SAGE Working Group on Vaccine Hesitancy developed the Vaccine Hesitancy Scale (VHS) to identify and compare hesitancy in different global settings. The objectives of the study were to describe and analyze vaccine hesitancy and to validate the VHS in a group of parents in Buenos Aires city, Argentina.MethodsA cross-sectional survey was conducted in parents of 1–3 and 12–15 year-old children at three health centres in Buenos Aires City, between June 2018 and May 2019. Sociodemographic data were collected together with history of refusal and/or delay in children’s vaccination (defined as hesitancy). The 10-item VHS using 5-point Likert-scale (higher scores indicating lower hesitancy) was administered and children’s immunization record cards were verified. Link between hesitancy and socio-demographic variables, and hesitancy and vaccination status was analyzed for five specific vaccines. Cronbach‘s α was used to determine internal consistency reliability and factor analysis to confirm survey subdomains. Simple and multiple regression analysis was used to examine associations between VHS scores and hesitancy, and VHS scores and vaccination status.ResultsSix hundred parents were surveyed and 469 immunization cards verified; 11.5% (n = 69) parents were hesitant. High maternal educational level showed significant association with hesitancy (OR 2.66 95% CI: 1.20–5.9) in the adjusted model. Hesitancy was significantly associated with incomplete MMR vaccination in children (OR 4.43 95% CI: 1.08–8.20) and HPV vaccination in adolescents (OR 3.75 95% CI: 1.54–9.12). Cronbach‘s α was 0.66 and factor analysis identified three underlying constructs: “Benefits”, “Harms” and “Confidence in healthcare system”. High scores in VHS were associated with lack of hesitancy (OR 1.2 95% CI: 1.13–1.27) and complete vaccination status (OR 1.07 95% CI: 1.02–1.12).ConclusionsHesitancy was associated with high maternal educational level, and incomplete MMR and HPV immunization status in children and adolescents. VHS was a reliable and valid tool in this population.     

Low vaccination in rural Sindh,Pakistan: A case of refusal,ignorance or access?

IntroductionPakistan is suffering from low routine childhood immunization (RI) coverage, meriting a systematic examination of community acceptance and barriers towards vaccination with a view to inform responsive strategies. We examine community perspectives on RI for children 0–23 months of age, unveiling community beliefs, health systems barriers and willingness to actively seek immunization services.MethodsA qualitative study was conducted in the rural under-resourced district of Tando Muhammad Khan of Pakistan’s Sindh province. 12 focus group discussions were conducted to probe immunization perceptions and experience: 6 with female caregivers of children <2 years and 6 with Lady Health workers (LHWs). An adapted Health Access Livelihood Framework guided data collection, qualitative data were thematically coded using inductive analysis and findings were triangulated across caregivers and LHWs.ResultsCaregivers were either indifferent to vaccination or had an unmet need to know more, with few reporting outright refusals to vaccinate. Caregiver beliefs were characterized by a lack of awareness and a confusion of RI with Polio and a fear of side effects. Religious beliefs were not major considerations. Second, health systems issues of hurried and infrequent vaccination encounters, driven by LHWs’ poor capability to handle the vaccine counter-narrative, interrupted vaccine delivery to villages. These challenges were exacerbated by interruptions due to the Polio campaigns. Third, time and public transport constrained access to the Extended Program on Immunization centers. However, female caregivers usually took decisions on vaccination without recourse to male household members, with child’s health viewed to be the main concern.ConclusionsAn ineffective vaccination narrative, low LHW capability and prioritization of RI, intermittent outreach vaccination encounters, and overshadowing of RI activities by Polio campaigns limit the uptake of childhood RI services. We contend that critical attention is required for post-immunization messaging, client-centric services, positive immunization experiences and the availability of vaccination encounters.     

Using classification and regression tree analysis to explore parental influenza vaccine decisions

Background and objectivesInfluenza poses a public health threat for children and adults. The CDC recommends annual influenza vaccination for children <18 years, yet vaccine uptake remains low for children (57.9%) and adults (37.1%). Given that parental decision-making is key in childhood vaccine uptake, there is a critical need to understand vaccine hesitancy among parents who decide not to vaccinate their children. This study aims to explore predictors of children’s influenza vaccine status given parental vaccination status and examine the factors that contribute to concordance or discordance between parental and children’s vaccine uptake.MethodsClassification and regression tree (CART) analyses were used to identify drivers of parental decisions to vaccinate their children against influenza. Hierarchy and interactions of these variables in predicting children’s vaccination status were explored.ResultsFrom a nationally representative sample of non-Hispanic Black and White parents who completed an online survey (n = 328), the main factors influencing parents’ decisions to vaccinate their children were vaccine behavior following physician recommendation, knowledge of influenza recommendations for children, influenza vaccine confidence and disease risk. Among unvaccinated parents, the greatest concordance was observed among parents who usually do not get vaccinated following physician recommendation and had lower knowledge of recommendations for influenza vaccination for children. The greatest discordance was observed among unvaccinated parents who had lower hesitancy about recommended vaccines.ConclusionsUnderstanding drivers of parental decisions to vaccinate themselves and their children can provide insights on health communication and provider approaches to increase influenza vaccine coverage and prevent influenza related mortality.     

Evaluation of the reliability and validity of a vaccine hesitancy scale on knowledge,attitude, trust and vaccination environment (KATE-S) in Chinese parents

ObjectiveTo verify the reliability and validity of a vaccine hesitancy scale about knowledge, attitude, trust and vaccination environment (KATE-S) among the Chinese parents.MethodsA questionnaire survey was conducted by convenience sampling in China using the KATE-S to assess knowledge of vaccines, attitudes towards vaccines, trust in acquired information and vaccination environment and vaccination status of vaccine introduced in immunization program among children.ResultA total of 199 valid questionnaires were collected from the parents. Among those, 83 (41.7%) parents accepted all vaccines without hesitancy, 111 (55.8%) parents accepted all but had hesitancy intention, and 5 (2.5%) had hesitancy behaviour of refusing or delaying vaccination. The overall test–retest reliability, split-half reliability and Cronbach's coefficient values were 0.924, 0.885 and 0.823, respectively. The scale-level content validity index (S-CVI) of universal agreement was 0.867, and the average S-CVI was 0.978. Exploratory factor analysis extracted seven common factors from the scale, and the cumulative contribution rate was 56.8%. The correlation coefficients between the items and their dimensions ranged from 0.405 to 0.760, with a calibration success rate of 100% for convergent and discriminant validity. After adjusting for the basic characteristics, the knowledge level of hesitancy intention group and hesitancy behavior group were both lower than accept all group (OR = 0.78, 95% CI: 0.65–0.94; OR = 0.26, 95 %CI: 0.07–0.94).ConclusionThe KATE-S has good reliability and validity in Chinese parents and would be considered to expand the sample size and survey areas to obtain more representative results.     

Differential determinants and reasons for the non- and partial vaccination of children among Nigerian caregivers

BackgroundVaccination has saved millions of lives. However, the vaccination rate in Nigeria remains low. We differentiate reasons for incomplete vaccination by status: not- and partially- vaccinated, and examine the association between sociodemographic characteristics of caregivers and reasons for incomplete vaccination.MethodsData from the Multiple Indicator Cluster Survey (MICS) conducted in Nigeria in 2016 and 2017 was analyzed. The logistic regression was used to evaluate associations between sociodemographic characteristics of caregivers and incomplete vaccination according to different reasons.ResultsThe most common reason for non-vaccination is that caregivers have no faith in immunization (27.0%), followed by lack of awareness of the need for immunization (26.0%) and the perception that the place where immunization is given is too far/inconvenient (24.3%). The most common reason for partial vaccination is that caregivers thought the children had already been fully immunized (44.8%), followed by the inconvenient location for immunization (15.3%) and supply-side issues such as shortage of vaccine stock and absence of vaccinators (14.4%). Among caregivers whose children are never vaccinated, a lower level of education is correlated with more likelihood of having no faith in immunization and poorer households are more likely to state a lack of awareness of the need for immunization need and an inconvenient place as the reasons for non-vaccination. Among caregivers whose children are only partially vaccinated, educated and wealthier caregivers are more likely to state that they thought their children were fully vaccinated, while poorer caregivers tend to give an inconvenient immunization place as the reason for incomplete vaccination. Supply-side barriers are not systematically correlated with educational attainment or wealth level of caregivers.ConclusionBarriers to vaccination are different according to vaccination status: not- and partially- vaccinated, as is the association between sociodemographic characteristics of caregivers and reasons for incomplete vaccination. The policy to increase vaccination take-up should take these differentials into consideration.     

Willingness of Brazilian caregivers in having their children and adolescents vaccinated against Covid-19

BackgroundThe vaccination of children and adolescents for the prevention of Covid-19 is important to:decrease in deaths and hospitalizations, prevent multisystem inflammatory syndrome, avoid long-term complications and decrease the suspension of on-site classes. Despite of these benefits, some studies have shown that some caregivers are still hesitancy.MethodsThis is a voluntary and anonymous online survey conducted from November 17 to December 14, 2021, in Brazil, through a free-of-charge platform with a link provided on social networks. A bivariate analysis was conducted with the independent variables, with vaccine hesitancy as the outcome variable, and a multivariate logistic model was used to calculated adjusted odds ratios.ResultsThe sample included 15,297 respondents. Approximately 13.3 % (2,028) of the caregivers were hesitant to vaccinate their children and adolescents against Covid-19 in at least one age group. The vaccination hesitanty rate of caregivers of children aged 0–4 years, 5–11 years and adolescents were 16 %, 13 %, 15 %, respectively. The principal factors associated with vaccine hesitancy were the following: belief that they need to wait longer, belief that children that had natural infection doesn’t need to vaccinate and belief that vaccine has long term adverse effects.Interpretation.The present study showed that the willingness of caregivers to have their children and adolescents vaccinated in Brazil is high compared to data from adult and pediatric international studies. This study provides a profile of the hesitant caregivers considering their perspectives and beliefs regarding vaccines that can help the elaboration of strategies to increase vaccine adherence.     

Caregiver willingness to vaccinate their children against COVID-19: Cross sectional survey

BackgroundMore than 100 COVID-19 vaccine candidates are in development since the SARS-CoV-2 genetic sequence was published in January 2020. The uptake of a COVID-19 vaccine among children will be instrumental in limiting the spread of the disease as herd immunity may require vaccine coverage of up to 80% of the population. Prior history of pandemic vaccine coverage was as low as 40% among children in the United States during the 2009 H1N1 influenza pandemic.PurposeTo investigate predictors associated with global caregivers’ intent to vaccinate their children against COVID-19, when the vaccine becomes available.MethodAn international cross sectional survey of 1541 caregivers arriving with their children to 16 pediatric Emergency Departments (ED) across six countries from March 26 to May 31, 2020.Results65% (n = 1005) of caregivers reported that they intend to vaccinate their child against COVID-19, once a vaccine is available. A univariate and subsequent multivariate analysis found that increased intended uptake was associated with children that were older, children with no chronic illness, when fathers completed the survey, children up-to-date on their vaccination schedule, recent history of vaccination against influenza, and caregivers concerned their child had COVID-19 at the time of survey completion in the ED. The most common reason reported by caregivers intending to vaccinate was to protect their child (62%), and the most common reason reported by caregivers refusing vaccination was the vaccine’s novelty (52%).ConclusionsThe majority of caregivers intend to vaccinate their children against COVID-19, though uptake will likely be associated with specific factors such as child and caregiver demographics and vaccination history. Public health strategies need to address barriers to uptake by providing evidence about an upcoming COVID-19 vaccine’s safety and efficacy, highlighting the risks and consequences of infection in children, and educating caregivers on the role of vaccination.     

Vaccine decision-making begins in pregnancy: Correlation between vaccine concerns,intentions and maternal vaccination with subsequent childhood vaccine uptake

IntroductionMaternal and childhood vaccine decision-making begins prenatally. Amongst pregnant Australian women we aimed to ascertain vaccine information received, maternal immunisation uptake and attitudes and concerns regarding childhood vaccination. We also aimed to determine any correlation between a) intentions and concerns regarding childhood vaccination, (b) concerns about pregnancy vaccination, (c) socioeconomic status (SES) and (d) uptake of influenza and pertussis vaccines during pregnancy and routine vaccines during childhood.MethodsWomen attending public antenatal clinics were recruited in three Australian states. Surveys were completed on iPads. Follow-up phone surveys were done three to six months post delivery, and infant vaccination status obtained via the Australian Childhood Immunisation Register (ACIR).ResultsBetween October 2015 and March 2016, 975 (82%) of 1184 mothers consented and 406 (42%) agreed to a follow up survey, post delivery. First-time mothers (445; 49%) had significantly more vaccine concerns in pregnancy and only 73% had made a decision about childhood vaccination compared to 89% of mothers with existing children (p-value < 0.001). 66% of mothers reported receiving enough information during pregnancy on childhood vaccination. In the post delivery survey, 46% and 82% of mothers reported receiving pregnancy influenza and pertussis vaccines respectively. The mother's degree of vaccine hesitancy and two attitudinal factors were correlated with vaccine uptake post delivery. There was no association between reported maternal vaccine uptake or SES and childhood vaccine uptake.ConclusionFirst time mothers are more vaccine hesitant and undecided about childhood vaccination, and only two thirds of all mothers believed they received enough information during pregnancy. New interventions to improve both education and communication on childhood and maternal vaccines, delivered by midwives and obstetricians in the Australian public hospital system, may reduce vaccine hesitancy for all mothers in pregnancy and post delivery, particularly first-time mothers.     

Estimating population immunity to poliovirus in Lebanon: Results from a seroprevalence survey, 2016

IntroductionCirculation of poliovirus in neighboring countries and mass population movement places Lebanon at risk of polio and other vaccine-preventable disease outbreaks. Determining population immunity levels is essential for guiding program planning and implementation of targeted supplementary immunization activities (SIAs) in governorates and subpopulations with low seroprevalence.MethodsA cross-sectional multi-stage cluster survey was conducted during February-December 2016 in all six governorates of Lebanon adapted from the World Health Organization (WHO) recommended Expanded Progamme on Immunization (EPI) methodology. Sera from selected children aged 12–59 months were tested for poliovirus neutralizing antibodies.ResultsOf 2,164 children recruited in this study, 1,893 provided sufficient quantity of serum samples for laboratory testing. Seroprevalence for all three poliovirus serotypes was greater than 90% in all six governorates. Poliovirus vaccine coverage with three or more doses, based on vaccination cards or parental recall, ranged between 54.1% for children aged 36–47 months in the North and 83.5% for children aged 48–59 months in Beirut.ConclusionImmunity to polioviruses was high in Lebanon in 2016 following a series of supplementary immunization activities. It is essential to continue strategies that increase vaccination coverage in order to sustain the considerably high immunity levels and prevent reintroduction and transmission of poliovirus. Educating caregivers and training health care workers on the standardized usage of home-based vaccination records is needed to guarantee the accuracy of records on children’s vaccination status.     

Forgone vaccination during childhood and adolescence: Findings of a statewide survey of parents

ObjectiveWidespread immunization confers both individual- and community-level protection against vaccine-preventable diseases. To better understand vaccine hesitancy, we assessed correlates of forgone vaccination for children and adolescents.MethodWe analyzed weighted data from the 2010 Child Health Assessment and Monitoring Program survey of North Carolina parents (n = 1,847) of children ages 1–17.ResultsOverall, 12% of parents reported having refused or delayed a vaccine for their child. Forgone vaccination was more common for young children than for teenagers (16% versus 8%) and for children born before rather than on/after their due dates (16% versus 10%). Parents with high (versus low) scores on an index of healthy feeding practices were also more likely to report forgone vaccination (17% versus 5%). The most common reason for forgoing vaccines was concern about safety (34%). Other reasons included believing the child did not need (18%) or was too young (13%) for the vaccine, or that the child was sick (10%).ConclusionForgoing vaccines is more common among parents who are socially advantaged and highly attentive to their children's health in other areas such as nutrition. Providers should reassure parents of premature or sick children that such circumstances are not typically contraindications to vaccination.     

Comparative analysis of the Parent Attitudes about Childhood Vaccines (PACV) short scale and the five categories of vaccine acceptance identified by Gust et al.

BackgroundThere is a need to develop a standardized tool to aid in identifying, measuring and classifying the unique needs of vaccine-hesitant parents (VHPs). This will also assist in designing tailored interventions to address these needs. The Parental Attitude about Childhood Vaccines (PACV) short scale developed by Opel et al., and the Gust et al. vaccine acceptance categories have been acknowledged as potentially useful tools to measure parental vaccine hesitancy. The PACV short scale requires further validation. In our study, we evaluated how the Gust et al. vaccine acceptance categories correspond with the PACV short scale.MethodsAs part of a larger study on vaccine attitudes, using the PACV short scale and Gust et al. vaccine acceptance categories, we assessed the correlation between the two measures using Spearman correlation coefficient, and the association between the two measures using the Cochran-Mantel-Haentszel test of association. We used logistic regression modelling to compare the association between a child’s up-to-date immunization status and (a) PACV short scale and (b) Gust et al. vaccine acceptance categories.ResultsThe PACV short scale and Gust et al. vaccine acceptance categories were positively correlated (r = 0.6, df = 198, p < 0.05), and the Cochran-Mantel-Haentszel test of association yielded a statistically significant association (p < 0.05). The two scales similarly predicted children’s up-to-date immunization status for all recommended childhood vaccines.ConclusionThe ability of the PACV short scale to identify and classify parental vaccine hesitancy is similar to classification using Gust et al. vaccine acceptance categories, and both measure linear entities. The PACV short scale is recommended for screening parents at their first pediatric visit because it is easier to administer. A clearer understanding of how to classify parental vaccine hesitancy can be used to design tailored interventions based on these classifications, to address their specific needs.     

Geographic proximity to immunization providers and vaccine series completion among children ages 0–24 months

ObjectivesIn the U.S., vaccination coverage is lower in rural versus urban areas. Spatial accessibility to immunization services has been a suspected risk factor for undervaccination in rural children. Our objective was to identify whether geographic factors, including driving distance to immunization providers, were associated with completion of recommended childhood vaccinations.MethodsWe analyzed records from Montana’s immunization information system for children born 2015–2017. Using geolocated address data, we calculated distance in road miles from children’s residences to the nearest immunization provider. A multivariable log-linked binomial mixed model was used to identify factors associated with completion of the combined 7-vaccine series by age 24 months.ResultsAmong 26,085 children, 16,503 (63.3%) completed the combined 7-vaccine series by age 24 months. Distance to the nearest immunization provider ranged from 0 to 81.0 miles (median = 1.7; IQR = 3.2), with the majority (92.1%) of children living within 10 miles of a provider. Long distances (>10 miles) to providers had modest associations with not completing the combined 7-vaccine series (adjusted prevalence ratio [aPR]: 0.97, 95% confidence interval [CI]: 0.96–0.99). After adjustment for other factors, children living in rural areas (measured by rural-urban commuting area) were significantly less likely to have completed the combined 7-vaccine series than children in metropolitan areas (aPR: 0.88, 95% CI: 0.85–0.92).ConclusionsLong travel distances do not appear to be a major barrier to childhood vaccination in Montana. Other challenges, including limited resources for clinic-based strategies to promote timely vaccination and parental vaccine hesitancy, may have greater influence on rural childhood vaccination.