A staff member watches out of the closed door of the Metropolitan Museum of Art on the 5th Avenue of New York City, the United States, March 19, 2020. The number of COVID-19 cases in the United States topped 13,000 as of 5:30 p.m. (2130 GMT) on Thursday, according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. The fresh figure reached 13,060 with 175 deaths. (Xinhua/Wang Ying)

A man wearing a facial mask moves with a scooter on Times Square in New York City, the United States, March 19, 2020. (Xinhua/Wang Ying)

A man jogs past the Metropolitan Museum of Art on the 5th Avenue of New York City, the United States, March 19, 2020. (Xinhua/Wang Ying)

Few people are seen on a street in New York City, the United States, March 19, 2020. (Xinhua/Wang Ying)

A peddler wearing facial mask looks after his booth near Times Square in New York City, the United States, March 19, 2020. (Xinhua/Wang Ying)

Tourists wearing facial masks sit on the red stairs on Times Square in New York City, the United States, March 19, 2020. (Xinhua/Wang Ying)

Pedestrians walk on the 5th Avenue of New York City, the United States, March 19, 2020. (Xinhua/Wang Ying)

People are seen on Times Square in New York City, the United States, March 19, 2020. (Xinhua/Wang Ying)

A woman wearing a facial mask poses for a photo on Times Square in New York City, the United States, March 19, 2020. (Xinhua/Wang Ying)

Tourists have a rest under an electronic news bulletin on Times Square in New York City, the United States, March 19, 2020. (Xinhua/Wang Ying)

A woman wearing a face mask walks past St. Patrick's Cathedral on the 5th Avenue of New York City, the United States, March 19, 2020. (Xinhua/Wang Ying)

A man waits for busrd on the 5th Avenue of New York City, the United States, March 19, 2020. (Xinhua/Wang Ying)