Non-compulsory Measures Sufficiently Reduced Human Mobility in Tokyo During the COVID-19 Epidemic

Overview

Journal Sci Rep

Specialty Science

Date 2020 Oct 23

PMID 33093497

Citations 99

Authors

Takahiro Yabe

Kota Tsubouchi

Naoya Fujiwara

Takayuki Wada

Yoshihide Sekimoto

Satish V Ukkusuri

Affiliations

Soon will be listed here.

Abstract

While large scale mobility data has become a popular tool to monitor the mobility patterns during the COVID-19 pandemic, the impacts of non-compulsory measures in Tokyo, Japan on human mobility patterns has been under-studied. Here, we analyze the temporal changes in human mobility behavior, social contact rates, and their correlations with the transmissibility of COVID-19, using mobility data collected from more than 200K anonymized mobile phone users in Tokyo. The analysis concludes that by April 15th (1 week into state of emergency), human mobility behavior decreased by around 50%, resulting in a 70% reduction of social contacts in Tokyo, showing the strong relationships with non-compulsory measures. Furthermore, the reduction in data-driven human mobility metrics showed correlation with the decrease in estimated effective reproduction number of COVID-19 in Tokyo. Such empirical insights could inform policy makers on deciding sufficient levels of mobility reduction to contain the disease.

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