A man walks outside the Biogen Inc., headquarters, Wednesday, March 11, 2020, in Cambridge, Mass. Seventy of Massachusetts' 92 confirmed coronavirus cases have been linked to a meeting of Biogen executives that was held at the Marriott Long Wharf hotel in Boston in late February 2020. For most people, the virus causes only mild or moderate symptoms, such as fever and cough. For some, especially older adults and people with existing health problems, it can cause more severe illness, including pneumonia. The vast majority of people recover from the new virus. (AP Photo/Steven Senne)
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