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White House coronavirus response coordinator Deborah Birx (front) attends a press conference on the coronavirus at the White House in Washington D.C., the United States, on March 2, 2020. The U.S. Centers for Disease Control and Prevention (CDC) announced Monday that there are currently 91 cases of COVID-19 in the country, up from just 60 cases a day ago. (Xinhua/Liu Jie)