People wearing face masks travel by metro in Brussels, Wednesday, March 18, 2020. Belgium has ordered further lockdown measures starting Wednesday, following in the steps of European neighbours Italy, Spain and France. 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/Francisco Seco)

March 19, 2020