A  pedestrian passes a sign marking the barrier of the "Closed Loop," a precaution against the coronavirus disease (COVID-19) ahead of the Beijing 2022 Winter Olympics in Beijing, China, January 30, 2022.
A pedestrian passes a sign marking the barrier of the "Closed Loop," a precaution against COVID-19, ahead of the Beijing 2022 Winter Olympics in Beijing, China, on January 30, 2022. REUTERS/Brian Snyder
The Closed Loop of the Beijing Olympics | Think Global Health