Spanish UME (Emergency Army Unit) soldiers disinfect the terminal to prevent the spread of COVID-19 at the airport of Barcelona, Spain, Thursday, March 19, 2020. For most people, the new coronavirus causes only mild or moderate symptoms. For some, it can cause more severe illness, especially in older adults and people with existing health problems. (AP Photo/Emilio Morenatti) 19/03/2020 - 06:03