A healthcare worker stands near a door at Kings County Hospital in New York, the United States, on April 28, 2020. The number of COVID-19 cases in the United States topped 1 million Tuesday afternoon, reaching 1,002,498 as of 1:55 p.m. (1755 GMT), according to the Center for Systems Science and Engineering at Johns Hopkins University. (Photo by Michael Nagle/Xinhua)
