Workers wearing protective gears disinfect as a precaution against the new coronavirus at the subway station in Seoul, South Korea, Friday, March 13, 2020. For most people, the new coronavirus 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. (AP Photo/Lee Jin-man)

March 13, 2020