A man with face mask stays in front of posters in a street in New York, the United States, March 24, 2020. The number of COVID-19 cases in the United States topped 60,000 as of 3:30 p.m. U.S. Eastern Time on Wednesday (1930 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Xinhua/Wang Ying)