In this photo taken on Thursday, March 12, 2020, A bus depot employee disinfects a bus in Moscow, Russia. For most people, the new COVID-19 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. (Denis Voronin, Moscow News Agency photo via AP)

March 13, 2020