Had COVID-19 spread in the community before the first confirmed case in Nagasaki, Japan?

Publication date: Available online 27 March 2021Source: Microbes and InfectionAuthor(s): Norihito Kaku, Kenji Ota, Daisuke Sasaki, Norihiko Akamatsu, Naoki Uno, Kei Sakamoto, Kosuke Kosai, Hiroo Hasegawa, Koichi Izumikawa, Hiroshi Mukae, Katsunori Yanagihara
Source: Microbes and Infection - Category: Infectious Diseases Source Type: research