A person in protective gear walks by an air purifier after emptying water at the curling venue ahead of the Beijing Winter Olympics Tuesday, Feb. 1, 2022, in Beijing. (AP Photo/Brynn Anderson)

A worker prepares to administer a COVID-19 test at the 2022 Winter Olympics, Tuesday, Feb. 1, 2022, in Beijing. (AP Photo/David J. Phillip)

Boxes of rice, fresh dumplings and twice-cooked spicy pork with fried scallions and fermented black beans sit on a table in the hotel room of Associated Press journalist John Leicester on Tuesday, Feb. 8, 2022, in Beijing. The meal was a surprise special dinner delivered to Leicester’s hotel room after spending some time in isolation after a positive coronavirus test that morning at the Winter Olympics. (AP Photo/John Leicester)

Workers in protective gear disinfect seats following the men's freestyle skiing big air finals of the 2022 Winter Olympics, Wednesday, Feb. 9, 2022, in Beijing. (AP Photo/Jae C. Hong)

Associated Press reporter John Leicester is held in Isolation Room 2, where he was kept while being re-tested for COVID-19 after testing positive at the 2022 Winter Olympics, Saturday, Feb. 5, 2022, in Beijing. (AP Photo/Steve Moyes)