US COVID-19 cases surpass 21 mln

People wearing face masks wait in line to buy groceries in Brooklyn, New York, the United States, Jan. 5, 2021. The confirmed COVID-19 cases in the United States topped 21 million on Tuesday. (Photo by Michael Nagle/Xinhua)

People wearing face masks walk in the Brooklyn borough of New York, the United States, Jan. 5, 2021. The confirmed COVID-19 cases in the United States topped 21 million on Tuesday. (Photo by Michael Nagle/Xinhua)

People wearing face masks are reflected in a window along the Fifth Avenue in New York, the United States, Jan. 5, 2021. The confirmed COVID-19 cases in the United States topped 21 million on Tuesday. (Photo by Michael Nagle/Xinhua)

People wearing face masks walk along the Fifth Avenue in New York, the United States, Jan. 5, 2021. The confirmed COVID-19 cases in the United States topped 21 million on Tuesday. (Photo by Michael Nagle/Xinhua)

A health worker carries soiled sheets and towels in front of the Maimonides Medical Center in New York, the United States, Jan. 5, 2021. The confirmed COVID-19 cases in the United States topped 21 million on Tuesday. (Photo by Michael Nagle/Xinhua)

Health workers wheel a patient on a stretcher out of an ambulance at the Maimonides Medical Center in New York, the United States, Jan. 5, 2021. The confirmed COVID-19 cases in the United States topped 21 million on Tuesday. (Photo by Michael Nagle/Xinhua)

Health workers wheel a patient on a stretcher at the Maimonides Medical Center in New York, the United States, Jan. 5, 2021. The confirmed COVID-19 cases in the United States topped 21 million on Tuesday. (Photo by Michael Nagle/Xinhua)

A man wearing a face mask jogs along the waterfront in New York, the United States, Jan. 5, 2021. The confirmed COVID-19 cases in the United States topped 21 million on Tuesday. (Photo by Michael Nagle/Xinhua)