The COVID-19 outbreak and implications for the Tokyo 2020 Summer Olympic Games

In 2020 the world witnessed the emergence of a new, viral, zoonotic pathogen (SARS-CoV2) causing an outbreak of Coronavirus disease 2019 (COVID-19) [1] that has lead the World Health Organization (WHO) to declare a Public Health Emergency of International Concern (PHEIC) [2–4]. Because multiple chains of transmission have been seen, full disembarkation of guests have been operated from February 19, while requesting exposed individuals to voluntarily restrict movement and report any symptoms for 14 days since disembarkation. In particular, the surveillance of severe acute respiratory diseases. Since January 7, 2020, the quarantine and detection measures of travelers from the city of Wuhan, have been improved at the points of entry.