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Serosurveillance reveals low measles antibody in children, suggesting a significant immunity gap in the population.
In 2022, we established a residual sample serosurveillance program in Ho Chi Minh City, Vietnam. During September 2022-April 2024, we found low measles antibody seroprevalence in children in the city's western region, where a measles outbreak began in May 2024. Serosurveillance could be a useful tool for outbreak prediction and prevention.
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Ong et al. (2025) studied this question.
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