A woman directs a man to a COVID-19 testing location at Kings County Hospital in Brooklyn, New York, the United States, on Dec. 3, 2020. The number of COVID-19 cases in the United States surpassed 14 million on Thursday, according to the Center for Systems Science and Engineering at Johns Hopkins University. (Photo by Michael Nagle/Xinhua)

Healthcare workers wheel a patient into Kings County Hospital in Brooklyn, New York, the United States, on Dec. 3, 2020. The number of COVID-19 cases in the United States surpassed 14 million on Thursday, according to the Center for Systems Science and Engineering at Johns Hopkins University. (Photo by Michael Nagle/Xinhua)

Healthcare workers wheel a patient outside Kings County Hospital in Brooklyn, New York, the United States, on Dec. 3, 2020. The number of COVID-19 cases in the United States surpassed 14 million on Thursday, according to the Center for Systems Science and Engineering at Johns Hopkins University. (Photo by Michael Nagle/Xinhua)

A patient is wheeled outside the emergency room of Maimonides Medical Center in Brooklyn, New York, the United States, on Dec. 3, 2020. The number of COVID-19 cases in the United States surpassed 14 million on Thursday, according to the Center for Systems Science and Engineering at Johns Hopkins University. (Photo by Michael Nagle/Xinhua)

Ambulances are seen parked outside the emergency room of SUNY Downstate Medical Center in Brooklyn, New York, the United States, on Dec. 3, 2020. The number of COVID-19 cases in the United States surpassed 14 million on Thursday, according to the Center for Systems Science and Engineering at Johns Hopkins University. (Photo by Michael Nagle/Xinhua)

People wait in line for COVID-19 tests at a CityMD Urgent Care in Brooklyn, New York, the United States, on Dec. 3, 2020. The number of COVID-19 cases in the United States surpassed 14 million on Thursday, according to the Center for Systems Science and Engineering at Johns Hopkins University. (Photo by Michael Nagle/Xinhua)