2024 No https://doi.org/10.2196/52713 Dassaye, Reshmi Africa Experimental Epidemiology Study Students Teachers Elementary (K-5) Middle/Jr High (6-8) Viruses COVID rates COVID-19 SARS-CoV-2 Learners Long COVID Seroprevalence Transmission dynamics This study used a cross-sectional and nested case-cohort design to assess SARS-CoV-2 prevalence, immune response, and long COVID in South African primary schools. Surveys and biological samples informed strategies for COVID-19 management in schools.