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BEIJING, CHINA - MARCH 16: A Chinese man wears a protective mask as he visit in Tiananmen Square on March 16, 2020 in Beijing, China. Since the new coronavirus covid-19 first emerged in late December 2019, more than 170,000 cases have been recorded in 150 countries and territories, killing 6,500 people. (Photo by Lintao Zhang/Getty Images)

BEIJING, CHINA - MARCH 16:  A Chinese man wears a protective mask as he visit in Tiananmen Square on March 16, 2020 in Beijing, China. Since the new coronavirus covid-19 first emerged in late December 2019, more than 170,000 cases have been recorded in 150 countries and territories, killing 6,500 people.  (Photo by Lintao Zhang/Getty Images)