Revealing trends in measles immunity during periods of varying measles circulation in Madagascar.

ABSTRACT: Estimating the durability of immunity from vaccination is complicated by unreported revaccination and unobserved natural infection or reexposure, which could result in overestimation of protection longevity. We tested serial, cross-sectional serum samples from 2005 to 2015 (n = 2530) for immunoglobulin G (IgG) to examine measles seroprevalence, spatiotemporal patterns of titers across regions, and antibody dynamics among children aged 1-9 years who grew up during varying measles circulation in Madagascar under a 1-dose vaccination schedule. We found that measles seroprevalence generally decreased over this period. Furthermore, we conducted 2 nested serological surveys, analyzing 393 samples taken in 2005 (n = 158), a time point preceded by high levels of measles circulation, and 2015 (n = 

SUBMITTER: Menezes A 

PROVIDER: S-EPMC12671958 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature