Clusters of Coronavirus Disease in Communities, Japan, January-April 2020

Emerg Infect Dis. 2020 Sep;26(9):2176-2179. doi: 10.3201/eid2609.202272. Epub 2020 Jun 10.

Abstract

We analyzed 3,184 cases of coronavirus disease in Japan and identified 61 case-clusters in healthcare and other care facilities, restaurants and bars, workplaces, and music events. We also identified 22 probable primary case-patients for the clusters; most were 20-39 years of age and presymptomatic or asymptomatic at virus transmission.

Keywords: 2019 novel coronavirus disease; COVID-19; Japan; SARS; SARS-CoV-2; coronavirus; epidemiology; respiratory infections; severe acute respiratory syndrome coronavirus 2; transmission; viruses; zoonoses.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Asymptomatic Infections / epidemiology*
  • Betacoronavirus*
  • Cluster Analysis
  • Coronavirus Infections / epidemiology*
  • Coronavirus Infections / transmission
  • Coronavirus Infections / virology
  • Disease Transmission, Infectious
  • Female
  • Humans
  • Japan / epidemiology
  • Male
  • Middle Aged
  • Pandemics
  • Pneumonia, Viral / epidemiology*
  • Pneumonia, Viral / transmission
  • Pneumonia, Viral / virology
  • Young Adult

Supplementary concepts

  • COVID-19
  • severe acute respiratory syndrome coronavirus 2