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Volume 26, Number 9—September 2020
Dispatch

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

Yuki Furuse1, Eiichiro Sando1, Naho Tsuchiya1, Reiko Miyahara1, Ikkoh Yasuda1, Yura K. Ko1, Mayuko Saito, Konosuke Morimoto, Takeaki Imamura, Yugo Shobugawa, Shohei Nagata, Kazuaki Jindai, Tadatsugu Imamura, Tomimasa Sunagawa, Motoi Suzuki, Hiroshi Nishiura, and Hitoshi OshitaniComments to Author 
Author affiliations: Kyoto University, Kyoto, Japan (Y. Furuse, K. Jindai); Nagasaki University, Nagasaki, Japan (E. Sando, I. Yasuda, K. Morimoto); Tohoku University, Sendai, Japan (N. Tsuchiya, Y.K. Ko, M. Saito, T. Imamura, S. Nagata, H. Oshitani); National Center for Global Health and Medicine, Tokyo, Japan (R. Miyahara); Niigata University, Niigata, Japan (Y. Shobugawa); Japan International Cooperation Agency, Tokyo (T. Imamura); National Institute of Infectious Diseases, Tokyo (T. Sunagawa, M. Suzuki); Hokkaido University, Sapporo, Japan (H. Nishiura)

Main Article

Figure 1

Analysis of 61 clusters of coronavirus disease (COVID-19) cases in communities in Japan, January 15–April 4, 2020. A) Cumulative number of COVID-19 cases, including the proportion of local cases with epidemiologic links to known confirmed cases. B) Distribution of clusters by number of cases in a cluster by category. C) Incidence of clusters of cases according to epidemiologic week as determined by date of confirmation of the first case in a cluster. Incidence of COVID-19 cases (weekly number of

Figure 1. Analysis of 61 clusters of coronavirus disease (COVID-19) cases in communities in Japan, January 15–April 4, 2020. A) Cumulative number of COVID-19 cases, including the proportion of local cases with epidemiologic links to known confirmed cases. B) Distribution of clusters by number of cases in a cluster by category. C) Incidence of clusters of cases according to epidemiologic week as determined by date of confirmation of the first case in a cluster. Incidence of COVID-19 cases (weekly number of newly reported cases) in Japan and timing of two importation waves are also displayed. Epidemiologic week 3 corresponds to January 15, 2020, in panel A. The data and trend of imported cases were previously reported and described by Furuse et al. (8).

Main Article

References
  1. Zhu  N, Zhang  D, Wang  W, Li  X, Yang  B, Song  J, et al.; China Novel Coronavirus Investigating and Research Team. A novel coronavirus from patients with pneumonia in China, 2019. N Engl J Med. 2020;382:727–33. DOIPubMedGoogle Scholar
  2. Huang  C, Wang  Y, Li  X, Ren  L, Zhao  J, Hu  Y, et al. Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China. Lancet. 2020;395:497–506. DOIPubMedGoogle Scholar
  3. World Health Organization. WHO Director-General’s opening remarks at the mission briefing on COVID-19—11 March 2020 [cited 2020 Jun 6]. https://www.who.int/dg/speeches/detail/who-director-general-s-opening-remarks-at-the-media-briefing-on-covid-19---11-march-2020
  4. World Health Organization. WHO Director-General’s opening remarks at the mission briefing on COVID-19—26 February 2020 [cited 2020 May 3]. https://www.who.int/dg/speeches/detail/who-director-general-s-opening-remarks-at-the-mission-briefing-on-covid-19---26-february-2020
  5. Pung  R, Chiew  CJ, Young  BE, Chin  S, Chen  MI, Clapham  HE, et al.; Singapore 2019 Novel Coronavirus Outbreak Research Team. Investigation of three clusters of COVID-19 in Singapore: implications for surveillance and response measures. Lancet. 2020;395:1039–46. DOIPubMedGoogle Scholar
  6. Shim  E, Tariq  A, Choi  W, Lee  Y, Chowell  G. Transmission potential and severity of COVID-19 in South Korea. Int J Infect Dis. 2020;93:339–44. DOIPubMedGoogle Scholar
  7. Ministry of Health. Labour and Welfare. About coronavirus disease 2019 (COVID-19) press conference June 2, 2020 [cited 2020 Jun 6]. https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/newpage_00032.html
  8. Furuse  Y, K Ko  Y, Saito  M, Shobugawa  Y, Jindai  K, Saito  T, et al.; National Task Force for COVID-19 Outbreak in Japan. Epidemiology of COVID-19 outbreak in Japan, January–March 2020. Jpn J Infect Dis. 2020; Epub ahead of print. DOIPubMedGoogle Scholar
  9. Jang  S, Han  SH, Rhee  J-Y. Coronavirus disease cluster associated with fitness dance classes, South Korea. Emerg Infect Dis. 2020 May 15 [Epub ahead of print].
  10. Hamner  L, Dubbel  P, Capron  I, Ross  A, Jordan  A, Lee  J, et al. High SARS-CoV-2 attack rate following exposure at a choir practice—Skagit County, Washington, March 2020. MMWR Morb Mortal Wkly Rep. 2020;69:606–10. DOIPubMedGoogle Scholar
  11. Prime Minister’s Office of Japan; Ministry of Health, Labour and Welfare. Avoid the “three Cs”! [cited 2020 May 27]. https://www.mhlw.go.jp/content/10900000/000615287.pdf
  12. Frieden  TR, Lee  CT. Identifying and interrupting superspreading events—implications for control of severe acute respiratory syndrome coronavirus 2. Emerg Infect Dis. 2020;26:1059–66. DOIPubMedGoogle Scholar

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1These authors contributed equally to this article.

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