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. 2021 Aug 4;27(11):1639–1647. doi: 10.1016/j.jiac.2021.07.024

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© 2021 Japanese Society of Chemotherapy and The Japanese Association for Infectious Diseases. Published by Elsevier Ltd. All rights reserved.

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Fig. 5 — Daily number of new patients with COVID-19 in 2020. The vertical axis shows the number of patients, and the horizontal axis days. The shaded area indicates the school closure period from 28 February to May 31, 2020. Figures for both Japan and Hokkaido Prefecture are shown.