Explainer: How will the virus emergency affect the Olympics?

People wearing face masks chat before parting at a train station in Tokyo, Friday, July 9, 2021. A state of emergency began Monday, July 12, 2021, in Tokyo, as the number of new cases is climbing fast and hospital beds are starting to fill just 11 days ahead of the Tokyo Olympics. (AP Photo/Hiro Komae)

People eat and drink at a restaurant in the evening in Tokyo on July 9, 2021. A state of emergency began Monday, July 12, 2021, in Tokyo, as the number of new cases is climbing fast and hospital beds are starting to fill just 11 days ahead of the Tokyo Olympics. (AP Photo/Hiro Komae)

Men stop to check out a restaurant and bar in Tokyo on July 9, 2021. A state of emergency began Monday, July 12, 2021, in Tokyo, as the number of new cases is climbing fast and hospital beds are starting to fill just 11 days ahead of the Tokyo Olympics. (AP Photo/Hiro Komae)

FILE - In this May 28, 2021, file photo, staff from the Tokyo Metropolitan Government urge people to go home from the Kabukicho entertainment district at the Shinjuku area in Tokyo, after the 8 p.m. suggested closing time for restaurants, bars and retail businesses under the state of emergency measure. A state of emergency began Monday, July 12, 2021, in Tokyo, as the number of new cases is climbing fast and hospital beds are starting to fill just 11 days ahead of the Tokyo Olympics. (AP Photo/Hiro Komae, File)

FILE - In this aerial photo, the Olympic Rings are seen with spectators' seats at the National Stadium in Tokyo Japan, Monday, June 21, 2021. A state of emergency began Monday, July 12, 2021 in Tokyo, as the number of new cases is climbing fast and hospital beds are starting to fill just 11 days ahead of the Tokyo Olympics. (Kyodo News via AP, File)

FILE - In this June 17, 2021, file photo, people walk past a big screen as Japanese Prime Minister Yoshihide Suga holds a news conference in a live broadcasting on the current state of Japan's response to the coronavirus, in Tokyo. A state of emergency began Monday, July 12, 2021 in Tokyo, as the number of new cases is climbing fast and hospital beds are starting to fill just 11 days ahead of the Tokyo Olympics. (AP Photo/Eugene Hoshiko, File)

People have dinner at a restaurant in Tokyo on Friday, July 9, 2021. A state of emergency began Monday, July 12, 2021, in Tokyo, as the number of new cases is climbing fast and hospital beds are starting to fill just 11 days ahead of the Tokyo Olympics. (AP Photo/Hiro Komae)