Author: Kaku, Norihito; Ota, Kenji; Sasaki, Daisuke; Akamatsu, Norihiko; Uno, Naoki; Sakamoto, Kei; Kosai, Kosuke; Hasegawa, Hiroo; Izumikawa, Koichi; Mukae, Hiroshi; Yanagihara, Katsunori
Title: Had COVID-19 spread in the community before the first confirmed case in Nagasaki, Japan? Cord-id: 04w2w5c2 Document date: 2021_3_27
ID: 04w2w5c2
Snippet: This retrospective study evaluated stored nasopharyngeal swab samples from Japanese patients with influenza-like illness during the 2019/2020 season. We aimed to determine whether COVID-19 had spread in the community before the first confirmed case. The period of influenza season during 2019/2020 in Nagasaki was shorter than in previous influenza seasons. When the first COVID-19 case was reported in Nagasaki prefecture, the number of influenza cases were very low. No positive results for SARS-Co
Document: This retrospective study evaluated stored nasopharyngeal swab samples from Japanese patients with influenza-like illness during the 2019/2020 season. We aimed to determine whether COVID-19 had spread in the community before the first confirmed case. The period of influenza season during 2019/2020 in Nagasaki was shorter than in previous influenza seasons. When the first COVID-19 case was reported in Nagasaki prefecture, the number of influenza cases were very low. No positive results for SARS-CoV-2 were detected in 182 samples that were obtained from adult outpatients. Our results revealed no large-scale spread of COVID-19 in the community before the first confirmed case.
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