Cumulative seroprevalence among healthcare workers after the first wave of the COVID-19 pandemic in El Salvador, Central America. (November 2022) - Nakagama, Yu; Rodriguez-Funes, Maria-Virginia; Dominguez, Rhina; Candray-Medina, Katherine-Sofia; Uemura, Naoto; Tshibangu-Kabamba, Evariste; Nitahara, Yuko; Kaku, Natsuko; Kaneko, Akira; Kido, Yasutoshi