japan’s covid-19 response. japan_0.pdf · 2020. 7. 15. · japan’s cluster-based approach ① 3...
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Japan’s COVID-19 Response
(2020/7/02)
OSHITANI Hitoshi, M.D. Ph.D, M.P.H. - Professor, Department of Virology, Tohoku University
Graduate School of Medicine; member of government advisory panel on COVID-19
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Epidemiological characteristics of COVID-19
and SARS ①2
Nishiura H et al. MedRxivhttps://doi.org/10.1101/2020.02.28.20029272
Leo YS et al. MMWR, 52(18); 405-411, 2003
SARS
COVID-19
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Japan’s cluster-based approach
①3
At an early stage, Japanese public health experts identified the virus’ characteristic mode of transmission
COVID-19 spreads by forming clusters. Preventing clusters, especially in the early phase of an outbreak, can result in suppression of the virus
Influenza COVID-19
Cluster
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Japan’s cluster-based approach
②
Retrospective tracing can identify infections more efficiently than a strictly prospective approach, enabling more effective control
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The “Three Cs”5
Based on analysis of the
shared characteristics of
clusters, Japan developed a concept called the “Three Cs”
to denote high-risk places and situations
• Closed spaces
• Crowded places
• Close-contact settings
The public was asked to avoid
the Three-Cs; awareness of the term became widespread
Further analysis of many clusters identified additional
risk factors such as exercise, talking in loud voice, singing
and nightlife-setting
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Epidemiology of COVID-19 in
Japan, January – June 2020
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COVID-19 deaths and deaths per
100,000 in G20 countries
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Number of deaths
Number of deaths / 100,000
Based on WHO Situation Report on 24 June 2020