A commuter wearing a face mask as a precaution against the COVID-19 illness is reflected on an advertising panel as he waits for his train in a subway station in Santiago Chile, Monday, March 16, 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/Esteban Felix), APTOPIX