A staff member closes the door of a makeshift morgue in New York, the United States, April 6, 2020. The number of COVID-19 cases in the United States reached 352,546 with 10,389 deaths as of 3:30 p.m. local time Monday (1930 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Photo by Michael Nagle/Xinhua)

Medical workers carry a patient into an ambulance in New York, the United States, April 6, 2020. The number of COVID-19 cases in the United States reached 352,546 with 10,389 deaths as of 3:30 p.m. local time Monday (1930 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Photo by Michael Nagle/Xinhua)

Trucks used as storage for bodies of victims who died of COVID-19 are seen in New York, the United States, April 6, 2020. The number of COVID-19 cases in the United States reached 352,546 with 10,389 deaths as of 3:30 p.m. local time Monday (1930 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Photo by Michael Nagle/Xinhua)

A medical worker transfers the body of a victim who died of COVID-19 at a hospital in New York, the United States, April 6, 2020. The number of COVID-19 cases in the United States reached 352,546 with 10,389 deaths as of 3:30 p.m. local time Monday (1930 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Photo by Michael Nagle/Xinhua)

Medical workers await orders next to ambulances outside a hospital in New York, the United States, April 6, 2020. The number of COVID-19 cases in the United States reached 352,546 with 10,389 deaths as of 3:30 p.m. local time Monday (1930 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Photo by Michael Nagle/Xinhua)

Medical workers are seen with empty beds outside a hospital in New York, the United States, April 6, 2020. The number of COVID-19 cases in the United States reached 352,546 with 10,389 deaths as of 3:30 p.m. local time Monday (1930 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Photo by Michael Nagle/Xinhua)

A medical worker transfers the body of a victim who died of COVID-19 at a hospital in New York, the United States, April 6, 2020. The number of COVID-19 cases in the United States reached 352,546 with 10,389 deaths as of 3:30 p.m. local time Monday (1930 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Photo by Michael Nagle/Xinhua)