Waning of vaccine-induced measles antibodies and population immunity gaps in the post-elimination era: a multicenter seroepidemiological study in China
Frontiers in Immunology·
- DOI
- 10.3389/fimmu.2026.1919103
- PMID
- —
- PMCID
- —
- OpenAlex
- W7203682940
- Study type
- Cross-sectional study
- Publisher
- Frontiers Media SA
- Article type
- journal-article
- Integrity
- current
Why this research matters now
Maintaining robust vaccination coverage alone may not sustain community protection once elimination targets are met. Residual vulnerability arises from declining antibody concentrations, postponed dosing schedules, and inconsistent immunization records, indicating that programmatic strategies should incorporate immune status tracking alongside traditional monitoring approaches.
Structured evidence summary
Research question
To evaluate measles antibody durability, locate population immunity deficits, and identify predictors of seronegativity following disease elimination in China.
Study design
The investigation employed a multicenter cross-sectional serological survey framework.
Population and setting
Participants included 2,083 individuals sampled across Jiangsu Province and the Xinjiang Uygur Autonomous Region during the 2024 to 2025 period.
Main findings
Overall protective antibody rates reached approximately 84.6 percent, with titers decreasing non-linearly as years passed since the final immunization. Youth between eight and seventeen months demonstrated the lowest seropositivity at roughly 28 percent. Extended intervals since vaccination significantly elevated seronegativity odds, whereas migration status ceased to show independent association after statistical adjustment.
Public-health relevance
Maintaining robust vaccination coverage alone may not sustain community protection once elimination targets are met. Residual vulnerability arises from declining antibody concentrations, postponed dosing schedules, and inconsistent immunization records, indicating that programmatic strategies should incorporate immune status tracking alongside traditional monitoring approaches.
Important limitations
The cross-sectional methodology restricts analysis to a single temporal snapshot, precluding direct longitudinal tracking of individual immune responses. Furthermore, excluding subjects without verified vaccination documentation or recent immunizations may narrow the applicability of results to broader demographic groups.
GIDS interpretation
This article supplies foundational epidemiological parameters regarding regional antibody decay and demographic susceptibility patterns. Analysts can reference these metrics to contextualize historical immunity trends and inform future sampling frameworks without implying alignment with active outbreak monitoring systems.
Related GIDS surveillance
Literature context does not validate, explain, or change a surveillance signal. Exact and contextual relationships are shown separately.
Evidence relationships
This article has 9 auditable classifier relationships to diseases, places, topics, and study design.