Sakamoto, Naoya, Masayuki Ota, Tomoko Takeda, Atsushi Kosaka, Takuya Washino, Sentaro Iwabuchi, Minako Beppu, Itaru Nishiduka, Tamano Matsui, Motoi Suzuki, and Fukumi 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 13, no. 1 (March 24, 2022): 5. Accessed March 28, 2024. https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/906.