Healthcare workers wheel hospital beds in front of Maimonides Medical Center during the coronavirus pandemic in the Brooklyn borough in New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

People drive up to a drive-thru COVID-19 testing site during the coronavirus pandemic in the Bronx borough of New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

A healthcare worker wheels hospital beds in front of Maimonides Medical Center during the coronavirus pandemic in the Brooklyn borough in New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

People drive up to a drive-through COVID-19 testing site during the coronavirus pandemic in the Bronx borough of New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

Healthcare workers carry a patient into a triage tent in front of Maimonides Medical Center during the coronavirus pandemic in the Brooklyn borough in New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

Healthcare workers carry a patient into a triage tent in front of Maimonides Medical Center during the coronavirus pandemic in the Brooklyn borough in New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

Appreciation words to medical workers are displayed on a window at Maimonides Medical Center during the coronavirus pandemic in the Brooklyn borough in New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

Cranes stand in front of the Lower Manhattan skyline during the coronavirus pandemic in New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

Healthcare workers carry a patient to the emergency room at NYU Langone Medical Center during the coronavirus pandemic in New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

Pedestrians walk through Times Square during the coronavirus pandemic in New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

Healthcare workers send a patient into the emergency room at Maimonides Medical Center during the coronavirus pandemic in the Brooklyn borough in New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

Healthcare workers carry a patient to the emergency room at NYU Langone Medical Center during the coronavirus pandemic in New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

Healthcare workers carry a patient to an ambulance outside Mount Sinai Beth Israel hospital during the coronavirus pandemic in New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

People drive up to a drive-through COVID-19 testing site during the coronavirus pandemic in the Bronx borough of New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

Soldiers cross a street in front of NYU Langone Medical Center during the coronavirus pandemic in New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

Healthcare workers bring a patient into the emergency room at Maimonides Medical Center during the coronavirus pandemic in the Brooklyn borough in New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)

A woman wearing face protection walks near NYU Langone Medical Center during the coronavirus pandemic in New York, the United States, April 8, 2020. The number of COVID-19 cases in the United States reached 401,166 as of 12:20 local time on Wednesday (1620 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 12,936 deaths were reported in the nation, according to the CSSE. (Photo by Michael Nagle/Xinhua)