NEW YORK, Dec. 20 (Xinhua) -- The number of COVID-19 cases in the United States surpassed 100 million on Tuesday, according to the Center for Systems Science and Engineering at Johns Hopkins University. ■
NEW YORK, Dec. 20 (Xinhua) -- The number of COVID-19 cases in the United States surpassed 100 million on Tuesday, according to the Center for Systems Science and Engineering at Johns Hopkins University. ■
