The Evaluation of a Standardized Call/Recall System for Childhood Immunizations in Wandsworth, England

Educational videos to address vaccine hesitancy in childhood immunization

Background

As 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.

Methods

This 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.

Results

A 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).

Conclusion

There 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.

After the European Global Vaccination Summit-The need for practical policies to boost vaccination delivery to children in Europe

BACKGROUND

Low childhood vaccination rates in Europe continue to cause concern and have triggered much policy study. However, regarding children, making immunisation a stand-alone issue cuts across integrated child health services. Most initiatives, including the 10 Action Points from the 2019 European-hosted Global Vaccination Summit, are all laudable but high level enablement policies. Delivery processes have been ignored, and key stakeholders not involved in discussions.

METHODS

Reviews of policies, literature and planned actions, leading to identification of further delivery policies needed to facilitate and stimulate practical accomplishments.

RESULTS

10 aspects are identified where European coordinated action to develop policies, share evidence and increase standards, would be beneficial. These also fit in with established European Commission strengths, and the incoming Commission's policies and priorities.

CONCLUSION

The European Commission, Member States and child health stakeholders should pursue a holistic approach, taking immunisation as a component of integrated child health. Service delivery should be compatible with modern societal challenges and related parenting patterns, and public health processes modernised and reinvigorated. Nursing and societal stakeholders should be brought in, and fit-for-purpose digital support facilitated. This is even more urgent following the diversion of the Covid-19 pandemic.

European Union initiatives in child immunization— the need for child centricity, e-health and holistic delivery

Background

Low childhood immunization rates in Europe are causing concern and have triggered several EU initiatives. However, these are counter-factual as they make immunization a stand-alone issue and cut across best practice in integrated child health services. They also focus unduly on ‘anti-vax’ pressures, generalize ‘vaccine hesitancy’ and overlook practical difficulties and uncertainties encountered by parents in real world situations about presenting children for immunization. Meanwhile European expertize in child health electronic record systems and relevant standards are ignored despite their being a potentially sound foundation ripe for enhancement.

Methods

Situation and literature reviews, and cohesion of two European research projects, led to shared investigation. As a result, two cross-sectoral expert workshops were held to consider digital health standards for harmonizing integrated preventive child health including immunization, and the work of other stakeholders such as the World Health Organisation and the European Centre for Disease Control.

Results

Progress in child health information models and digital health standards was assessed, areas needing further standards development identified and desirable steps towards innovation in service delivery and record keeping agreed.

Conclusion

The European Commission, member states and child health stakeholders should take an integrated approach to child health with immunization as a component. Service delivery should be sensitive to parental concerns and challenges, and the way child- and family-centric data are recorded and used should be enhanced. Services should be enabled by the International Patient Summary and related electronic health record standards and linkages, and evaluated to assess most effective systems and practice.

Vaccination in England: a review of why business as usual is not enough to maintain coverage

BACKGROUND

The vaccine system in England underwent radical changes in 2013 following the implementation of the Health and Social Care Act. There have since been multi-year decreases in coverage of many vaccines. Healthcare professionals have reported finding the new system fragmented and challenging. This study aims to produce a logic model of the new system and evaluate the available evidence for interventions to improve coverage.

METHODS

We undertook qualitative document analysis to develop the logic model using process evaluation methods. We performed a systematic review by searching 12 databases with a broad search strategy to identify interventions studied in England conducted between 2006 and 2016 and evaluated their effectiveness. We then compared the evidence base to the logic model.

RESULTS

We analysed 83 documents and developed a logic model describing the core inputs, processes, activities, outputs, outcomes and impacts of the new vaccination system alongside the programmatic assumptions for each stage. Of 9,615 unique articles, we screened 624 abstracts, 45 full-text articles, and included 16 studies: 8 randomised controlled trials and 8 quasi-experimental studies. Four studies suggest that modifications to the contracting and incentive systems can increase coverage, but changes to other programme inputs (e.g. human or capital resources) were not evaluated. Four multi-component intervention studies modified activities and outputs from within a GP practice to increase coverage, but were part of campaigns or projects. Thus, many potentially modifiable factors relating to routine programme implementation remain unexplored. Reminder/recall systems are under-studied in England; incentive payments to adolescents may be effective; and only two studies evaluated carer information.

CONCLUSIONS

The evidence base for interventions to increase immunisation coverage in the new system in England are limited by a small number of studies and by significant risk of bias. Several areas important to primary care remain unexplored as targets for interventions, especially modification to organisational management.

Feasibility of implementing a cellphone-based reminder/recall strategy to improve childhood routine immunization in a low-resource setting: a descriptive report

Background

Reminder/recall systems are effective ways to improve immunization rates, but their feasibility in primary health care (PHC) settings in Nigeria has not been adequately evaluated. In this study we describe the acceptability and adaptability of immunization reminder/recall system in an urban setting in southwest Nigeria.

Methods

This is a descriptive report of a cluster randomized controlled trial. Four local government areas (LGAs) were randomly assigned into a cellphone reminder/recall intervention group or a usual care control group. Within each LGA, PHC centers were purposively selected to participate in the study. In each PHC center, mothers and their infants aged 0–3 months were enrolled into the two groups during the infants’ first immunization visit. Mothers (or other contact persons) in the intervention group received cellphone calls reminding them to take their child for scheduled immunizations. Follow-up of all the children lasted till the final scheduled immunization visit for each child. The intervention lasted for 13 months.

Results

A total of 595 mothers/infants pairs (295 in the intervention group and 300 in the control group) participated in the study. Almost all mothers (n = 590, 99.2%) had access to their own cellphone or had access to a cellphone belonging to a significant other. Ninety-eight percent (n = 584) of all mothers were willing to receive immunization reminder/recall phone calls.

Eighty-seven percent (n = 2023) of all calls (n = 2324) for the reminder/recall intervention went through to the recipients and of these calls, 1948 (96.3%) were received. The mean cost of each call in US Dollars was about 5 cents. Immunization compliance rate (the receipt of required number of doses of routine vaccines at the appropriate age at recommended interval) was 79.2% among the children in intervention group and 46.4% in the control group (p < 0.001).

Conclusion

Results demonstrate that cellphone reminder/recall interventions to improve routine childhood immunization are feasible in PHC settings in limited-resource settings with wide cellphone coverage, such as urban areas in Nigeria. Further research to test the potential for scale up in a variety of settings is recommended.

Trial registration

PACTR201702002043415; Date of registration: 17 February 2017. (Retrospectively registered).

Measuring inequalities in immunization in Wales and the impact of interventions

We reviewed uptake of childhood immunization in Wales by quintile of deprivation and found that uptake was significantly lower in residents in the most socio-economically deprived areas compared with the least deprived. Differences were greater in older children. Services generally met best practice recommended by the National Institute for Health and Care Excellence; however, follow up of children who had not responded to invitations to attend routine immunization sessions needed more consistent implementation. Over a three year period to 2014-15 the difference in uptake between upper and lower quintiles at the fourth birthday reduced from 8.9% to 6.7%.

Interventions to reduce inequalities in vaccine uptake in children and adolescents aged <19 years: a systematic review

BACKGROUND

In high-income countries, substantial differences exist in vaccine uptake relating to socioeconomic status, gender, ethnic group, geographic location and religious belief. This paper updates a 2009 systematic review on effective interventions to decrease vaccine uptake inequalities in light of new technologies applied to vaccination and new vaccine programmes (eg, human papillomavirus in adolescents).

METHODS

We searched MEDLINE, Embase, ASSIA, The Campbell Collaboration, CINAHL, The Cochrane Database of Systematic Reviews, Eppi Centre, Eric and PsychINFO for intervention, cohort or ecological studies conducted at primary/community care level in children and young people from birth to 19 years in OECD countries, with vaccine uptake or coverage as outcomes, published between 2008 and 2015.

RESULTS

The 41 included studies evaluated complex multicomponent interventions (n=16), reminder/recall systems (n=18), outreach programmes (n=3) or computer-based interventions (n=2). Complex, locally designed interventions demonstrated the best evidence for effectiveness in reducing inequalities in deprived, urban, ethnically diverse communities. There is some evidence that postal and telephone reminders are effective, however, evidence remains mixed for text-message reminders, although these may be more effective in adolescents. Interventions that escalated in intensity appeared particularly effective. Computer-based interventions were not effective. Few studies targeted an inequality specifically, although several reported differential effects by the ethnic group.

CONCLUSIONS

Locally designed, multicomponent interventions should be used in urban, ethnically diverse, deprived populations. Some evidence is emerging for text-message reminders, particularly in adolescents. Further research should be conducted in the UK and Europe with a focus on reducing specific inequalities.

Parental reminder, recall and educational interventions to improve early childhood immunisation uptake: A systematic review and meta-analysis

Vaccination is one of the most effective ways of reducing childhood mortality. Despite global uptake of childhood vaccinations increasing, rates remain sub-optimal, meaning that vaccine-preventable diseases still pose a public health risk. A range of interventions to promote vaccine uptake have been developed, although this range has not specifically been reviewed in early childhood. We conducted a systematic review and meta-analysis of parental interventions to improve early childhood (0-5 years) vaccine uptake. Twenty-eight controlled studies contributed to six separate meta-analyses evaluating aspects of parental reminders and education. All interventions were to some extent effective, although findings were generally heterogeneous and random effects models were estimated. Receiving both postal and telephone reminders was the most effective reminder-based intervention (RD=0.1132; 95% CI=0.033-0.193). Sub-group analyses suggested that educational interventions were more effective in low- and middle-income countries (RD=0.13; 95% CI=0.05-0.22) and when conducted through discussion (RD=0.12; 95% CI=0.02-0.21). Current evidence most supports the use of postal reminders as part of the standard management of childhood immunisations. Parents at high risk of non-compliance may benefit from recall strategies and/or discussion-based forums, however further research is needed to assess the appropriateness of these strategies.

Strategies for addressing vaccine hesitancy - A systematic review

The purpose of this systematic review is to identify, describe and assess the potential effectiveness of strategies to respond to issues of vaccine hesitancy that have been implemented and evaluated across diverse global contexts.

METHODS

A systematic review of peer reviewed (January 2007-October 2013) and grey literature (up to October 2013) was conducted using a broad search strategy, built to capture multiple dimensions of public trust, confidence and hesitancy concerning vaccines. This search strategy was applied and adapted across several databases and organizational websites. Descriptive analyses were undertaken for 166 (peer reviewed) and 15 (grey literature) evaluation studies. In addition, the quality of evidence relating to a series of PICO (population, intervention, comparison/control, outcomes) questions defined by the SAGE Working Group on Vaccine Hesitancy (WG) was assessed using Grading of Recommendations Assessment, Development and Evaluation (GRADE) criteria; data were analyzed using Review Manager.

RESULTS

Across the literature, few strategies to address vaccine hesitancy were found to have been evaluated for impact on either vaccination uptake and/or changes in knowledge, awareness or attitude (only 14% of peer reviewed and 25% of grey literature). The majority of evaluation studies were based in the Americas and primarily focused on influenza, human papillomavirus (HPV) and childhood vaccines. In low- and middle-income regions, the focus was on diphtheria, tetanus and pertussis, and polio. Across all regions, most interventions were multi-component and the majority of strategies focused on raising knowledge and awareness. Thirteen relevant studies were used for the GRADE assessment that indicated evidence of moderate quality for the use of social mobilization, mass media, communication tool-based training for health-care workers, non-financial incentives and reminder/recall-based interventions. Overall, our results showed that multicomponent and dialogue-based interventions were most effective. However, given the complexity of vaccine hesitancy and the limited evidence available on how it can be addressed, identified strategies should be carefully tailored according to the target population, their reasons for hesitancy, and the specific context.