Aspect of the coronavirus outbreak
This article documents the chronology of the response to the COVID-19 pandemic in February 2021, which originated in Wuhan, China in December 2019. Some developments may become known or fully understood only in retrospect. Reporting on this pandemic began in December 2019.
Reactions and measures in South, Southeast and East Asia.
15 February.
Tokyo local government officials said that Covid-19 cases in Tokyo were underreported by 838 between 18 Nov 2020 and 31 Jan 2021.
They said that an increased workload resulted in the error: the local government's health department was understaffed
given the fact that the number of Covid cases were surging and new daily cases hit a record high on 7 January 2021. 
References.
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