Childhood Vaccine Completion Rates Widened Since 2013

New York parents are increasingly delaying routine immunizations for toddlers, leaving a growing gap in protection by age five.

Updated on Sept. 29, 2026 in Children’s Health

Gouache-painted editorial illustration of a sterile pediatric exam table in a quiet room, representing health coverage trends. — New York health officials report that early childhood immunization completion rates have declined since 2013, creating a widening window of vulnerability for toddlers. AI Illustration. Upload story photo >

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Statewide completion rates for the seven-vaccine series by age two leveled off during the COVID-19 pandemic and have since declined, with only about 6 in 10 children fully vaccinated by their second birthday in 2023. While many children eventually catch up by age five due to school enrollment requirements, the disparity in early vaccination status has grown significantly.

Why it matters

The widening gap in early immunization coverage complicates public health efforts to prevent outbreaks of vaccine-preventable diseases like measles and polio. Factors ranging from logistical barriers to a post-pandemic erosion of trust in healthcare providers continue to drive these shifting patterns across New York.

An analysis of state vaccination records from 2013 to 2023 revealed a 14% increase in age-two completion rates over the decade, despite a recent post-2022 decline. The study notes significant county-level variation, ranging from a 32% completion rate in Rockland County to 78% in Warren County.

The details

Vaccination completion typically relies on a series of routine medical visits that were significantly disrupted as families delayed care to avoid COVID-19 exposure. While mandatory school enrollment acts as a critical catch-up point by age five, children missing doses in their first two years face persistent barriers such as unstable health insurance, limited transportation, and work-schedule conflicts. This creates a window of vulnerability during the toddler years, evidenced by measles cases in several counties and a 2022 polio case in an unvaccinated resident.

2013 marked the study baseline for tracking childhood immunization series completion.
2019 represented the point when vaccination completion rates stopped their steady rise.
July 2022 saw the first confirmed polio case reported in a Rockland County resident.
2023 concluded the observation period for state vaccination completion data.
Since July 2026, measles cases have been reported in seven counties across New York.

Health Landscape

The data reflects a broader shift in pediatric healthcare following the pandemic, where early-childhood routine visits have become less consistent. This trend contrasts with the relative stability of school-mandated vaccination programs that ensure most children eventually reach the recommended series.

Parents concerned about vaccination gaps should contact their pediatrician to review their child's records and discuss strategies for overcoming access barriers. It is worth confirming your child's immunization status ahead of major school-enrollment milestones to ensure any missed doses are addressed.

The takeaway

The trend of delaying childhood immunizations leaves toddlers vulnerable before they reach school age. If you are uncertain about your child's vaccination history or current needs, initiate a conversation with your family physician to ensure all scheduled doses are up to date.