People wearing face masks walk on a street in Hong Kong, south China, March 16, 2021. Hong Kong reported 18 additional cases of COVID-19 on Tuesday, taking the tally to 11,329. Of the new cases, 13 were locally transmitted, including two untraceable infections, Hong Kong's Center for Health Protection said in a statement. (Xinhua/Lo Ping Fai)

People wearing face masks walk on a street in Hong Kong, south China, March 16, 2021. Hong Kong reported 18 additional cases of COVID-19 on Tuesday, taking the tally to 11,329. Of the new cases, 13 were locally transmitted, including two untraceable infections, Hong Kong's Center for Health Protection said in a statement. (Xinhua/Lo Ping Fai)

People wearing face masks are seen in Hong Kong, south China, March 16, 2021. Hong Kong reported 18 additional cases of COVID-19 on Tuesday, taking the tally to 11,329. Of the new cases, 13 were locally transmitted, including two untraceable infections, Hong Kong's Center for Health Protection said in a statement. (Xinhua/Lo Ping Fai)

People wearing face masks are seen on a street in Hong Kong, south China, March 16, 2021. Hong Kong reported 18 additional cases of COVID-19 on Tuesday, taking the tally to 11,329. Of the new cases, 13 were locally transmitted, including two untraceable infections, Hong Kong's Center for Health Protection said in a statement. (Xinhua/Lo Ping Fai)

A worker wearing a face mask transports goods with a cart in Hong Kong, south China, March 16, 2021. Hong Kong reported 18 additional cases of COVID-19 on Tuesday, taking the tally to 11,329. Of the new cases, 13 were locally transmitted, including two untraceable infections, Hong Kong's Center for Health Protection said in a statement. (Xinhua/Lo Ping Fai)