A vender waits for customers at a kiosk on Times Square in New York, the United States, July 23, 2020. The number of COVID-19 cases in the United States surpassed the 4 million mark Thursday to reach 4,005,414 as of 3:04 p.m. local time (1904 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Photo: Xinhua)

Photo taken on July 23, 2020 shows the Times Square in New York, the United States. The number of COVID-19 cases in the United States surpassed the 4 million mark Thursday to reach 4,005,414 as of 3:04 p.m. local time (1904 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University.

Pedestrians walk past a social distancing notice on Times Square in New York, the United States, July 23, 2020. The number of COVID-19 cases in the United States surpassed the 4 million mark Thursday to reach 4,005,414 as of 3:04 p.m. local time (1904 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University.

A man walks on Times Square in New York, the United States, July 23, 2020. The number of COVID-19 cases in the United States surpassed the 4 million mark Thursday to reach 4,005,414 as of 3:04 p.m. local time (1904 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University.

Pedestrians walk on Times Square in New York, the United States, July 23, 2020. The number of COVID-19 cases in the United States surpassed the 4 million mark Thursday to reach 4,005,414 as of 3:04 p.m. local time (1904 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University.