The U.S. Capitol building is seen in Washington D.C. May 13, 2020. (Xinhua/Liu Jie)

Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, speaks during a teleconference hearing hosted by a Senate panel on the White House's response to the coronavirus in Washington D.C., the United States, May 12, 2020. (Xinhua/Liu Jie)

Medical workers transport a patient from an ambulance to George Washington University Hospital in Washington D.C., the United States, May 13, 2020. (Photo by Ting Shen/Xinhua)

People walk near the Lincoln Memorial in Washington D.C., the United States, April 26, 2020. (Photo by Ting Shen/Xinhua)

A man walks past an electronic screen showing COVID-19 prevention guidance in Brooklyn of New York, the United States, May 11, 2020. (Xinhua/Wang Ying)

People wait at a COVID-19 community testing center during the COVID-19 pandemic in the Brooklyn borough of New York, the United States, May 14, 2020. (Photo by Michael Nagle/Xinhua)