BEIJING, CHINA - JUNE 24: Chinese epidemic control workers wear protective suits as they disinfect each other after performing nucleic acid swab test for COVID-19 on citizens at a government testing site in Xicheng District during an organized tour on June 24, 2020 in Beijing, China. While Chinese government medical officials have said they believe they have controlled the spread, authorities are trying to contain the outbreak linked to the Xinfadi wholesale food market, Beijing's biggest supplier of produce and meat. More than 2.5 million people have undergone nucleic acid tests for COVID-19 at dozens of sites across the city in recent days, with officials using contact tracing to target high and middle risk areas and people who may have had contact with the market or food that came from there. Several neighborhoods have been locked down and a number of other food markets have been closed, The outbreak has triggered fears of a second wave of infection after 56 straight days with no domestically transmitted cases in the capital. (Photo by Kevin Frayer/Getty Images)