Incidence, household transmission, and neutralizing antibody seroprevalence of Coronavirus Disease 2019 in Egypt: Results of a community-based cohort. - Gomaa MR; El Rifay AS; Shehata M; Kandeil A; Nabil Kamel M; Marouf MA; GabAllah M; El Taweel A; Kayed AE; Kutkat O; Moatasim Y; Mahmoud SH; et al. (PLoS pathogens, 2021)