Sakamoto, N., M. . Ota, T. Takeda, A. Kosaka, T. Washino, S. Iwabuchi, M. Beppu, I. Nishiduka, T. Matsui, M. Suzuki, and F. Nakamura-Uchiyama. “Nosocomial Outbreak of Coronavirus Disease in Two General Wards During the Initial Wave of the Pandemic in 2020, Tokyo, Japan: Nosocomial Outbreak of COVID-19”. Western Pacific Surveillance and Response, vol. 13, no. 1, Mar. 2022, p. 5, doi:10.5365/wpsar.2022.13.1.906.