Peer-reviewed article
Alternative Childhood Vaccination Schedules in Israel: A Mixed-Methods Study on Prevalence, Patterns, and Public Health Implications.
Efrat Sales, Eliya Cohen, Deena R Zimmerman, Nadav Davidovitch, Alison McCallum et al. ·
Summary
Written by AI, not yet AICS's view · claude-haiku-4-5-20251001This study examined how often parents in Israel request alternative vaccination schedules that split or delay combination vaccines, and why they make these choices. Researchers analyzed vaccination records from 2018 to 2021 and interviewed parents, healthcare providers, and policymakers. Alternative schedules were rare, affecting less than 1% of vaccinations, but parents were driven by safety concerns, fears of immune overload, and mistrust of health authorities, often influenced by misinformation.
Key points
- Alternative vaccination schedules using single-antigen vaccines instead of combination vaccines accounted for less than 1% of vaccinations overall in Israel
- Parents' main reasons for requesting alternative schedules were safety concerns, fear of immune overload, and mistrust of authorities
- Alternative schedules led to delayed vaccine administration, lower uptake of combination vaccines, and incomplete protection in certain groups
- Misinformation amplified parental concerns, while healthcare providers struggled to balance parental preferences with maintaining adequate population coverage
- The study identifies tension between individualized parental decision-making and the collective health benefits of standard vaccination programs
Limitations
The study does not measure actual health outcomes or disease incidence among children receiving alternative schedules compared to standard schedules. The findings are specific to Israel's healthcare system and policy context, and may not generalize to other countries with different vaccination policies or population characteristics.
Abstract
Background/Objectives: Vaccination programs are highly effective public health interventions, yet parental hesitancy toward combination vaccines has led to growing demand for alternative vaccination schedules, defined in this study as parental requests to split or replace recommended combination vaccines with single-antigen vaccines for non-clinical reasons. While parental attitudes have been widely studied, little empirical evidence exists on the real-world use of single-antigen vaccines and their public health implications in countries with otherwise high coverage. This study examined the prevalence patterns and parental motivations for requesting such alternative vaccination schedules in Israel, where national guidelines recommend specific combination vaccines, including measles-mumps-rubella-varicella (MMRV) and the pentavalent diphtheria-tetanus-pertussis-inactivated polio-Haemophilus influenzae type b (DTaP+IPV+Hib) vaccines, but informal accommodations exist. Methods: A mixed-methods design was employed: a retrospective cohort analysis of vaccination data from 2018 to 2021 (before and during the COVID-19 pandemic) focused on measles (first dose at 12 months) and pertussis (four-dose primary series), followed by semi-structured interviews with Maternal and Child Health clinic providers, policymakers, and parents. Results: Alternative vaccination schedules involving single-antigen measles or pertussis vaccines are occasionally used despite official policy, accounting for less than 1% of vaccinations overall. Outcomes include delayed administration, lower uptake of combination vaccines, and incomplete protection in certain groups. Parents cited safety concerns, fear of immune overload, and mistrust of authorities. These concerns were often amplified by misinformation, while providers described balancing parental preferences with the need for adequate coverage. Conclusions: This study provides new evidence on how vaccine hesitancy translates into service utilization, highlights the tension between individualized parental decision-making and contribution to collective health, and underscores the need for communication, policy strategies and service designs that sustain high coverage while addressing community-specific concerns.
Findings the Hub has extracted
Each claim below is labelled by its type of design and links back to this report.
- Intervention
- Observational assessment of the prevalence and patterns of alternative vaccination schedules in real-world clinical practice, combined with qualitative interviews exploring parental motivations and provider perspectives
- Population
- Children in Israel aged 12 months through primary vaccination series completion (pertussis series); parents, maternal and child health clinic providers, and policymakers in Israel
Key finding
Alternative vaccination schedules accounted for less than 1% of vaccinations overall