Peer-reviewed article
Birth Cohort Study on Longitudinal Impact of Internal Migration Status on Routine Vaccination Coverage in the First Three Years of Life - Beijing, China, 2021-2025.
Zhiqiang Cao, Rui Yu, Qianli Yuan, Yushu Feng, Wenyan Ji et al. ·
Summary
Written by AI, not yet AICS's view · claude-haiku-4-5-20251001This birth cohort study in Beijing examines how internal migration affects vaccination coverage in children during their first three years of life. The research finds that families who migrate across provincial borders experience progressively wider gaps in immunization coverage compared to non-migrating families. The study identifies delayed vaccinations and missed catch-up opportunities as key problems resulting from migration-related barriers to consistent healthcare access.
Key points
- High population mobility undermines efforts to maintain immunization coverage
- Migration across provincial administrative divisions drives progressively widening coverage disparities
- Delayed vaccination and missed catch-up opportunities occur within China's National Immunization Program
- Barriers to accessing consistent healthcare are experienced by mobile families
- Preschool enrollment represents a key opportunity for vaccination verification and catch-up efforts
Limitations
As a study protocol or interim report, this document does not provide detailed results or quantitative findings on the magnitude of coverage disparities. The long-term outcomes and effectiveness of recommended interventions are not yet evaluated.
Abstract
WHAT IS ALREADY KNOWN ABOUT THIS TOPIC?: High population mobility frequently undermines public health efforts to maintain immunization coverage, as mobile families often face barriers to accessing consistent healthcare. WHAT IS ADDED BY THIS REPORT?: Migration across provincial-level administrative divisions (PLADs) drives progressively widening coverage disparities while contributing to delayed vaccination and missed catch-up opportunities within the National Immunization Program (NIP) during the first three years of life in China. WHAT ARE THE IMPLICATIONS FOR PUBLIC HEALTH PRACTICE?: These findings underscore the need for a dynamic, life-course approach to migrant child immunization, with heightened focus on ensuring coverage during infancy. Vaccination verification and catch-up efforts should be intensified at preschool enrollment.
Findings the Hub has extracted
Each claim below is labelled by its type of design and links back to this report.
- Intervention
- A longitudinal birth cohort study tracking vaccination coverage and timing in children from migrating versus non-migrating families, with planned intensified verification and catch-up efforts at preschool enrollment
- Population
- Birth cohorts in Beijing, China, 2021-2025, including children from internally migrating families and non-migrating families
Key finding
Migration across provincial-level administrative divisions drives progressively widening coverage disparities
Cao et al. · PubMed (US National Library of Medicine) · 26 Jun 2026