COVID-19 cases in U.S. top 300,000: Johns Hopkins University

A shopper (L) wearing a mask walks into a supermarket in Arlington, Virginia, the United States, April 4, 2020. The number of COVID-19 cases in the United States topped 300,000 by 3:40 p.m. local time Saturday (1940 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Xinhua/Liu Jie)