Multi-pathogen serosurveillance reveals correlated vaccination performance, waning tetanus immunity, and diphtheria boosting in Zambian children.
BACKGROUND Vaccination coverage estimates and case-based surveillance have limitations in evaluating immunization programs. Serosurveillance offers a complementary approach by directly measuring population immunity. We assessed whether serologic analyses across multiple antigens (i.e., measles, diphtheria, tetanus) cou...