SARS-CoV-2 seroprevalence and infection rate in Manila, Philippines prior to national vaccination program implementation: a repeated cross-sectional analysis. - Malijan, Greco Mark B.; Edwards, Tansy; Agrupis, Kristal An; Suzuki, Shuichi; Villanueva, Annavi Marie G.; Sayo, Ana Ria; De Guzman, Ferdinand; Dimapilis, Alexis Q.; Solante, Rontgene M.; Telan, Elizabeth O.; Umipig, Dorcas V.; Ota, Kenji; et al. (Tropical Medicine & Health, 2022)