A mother puts a face mask on her child in a city park in Kyiv, Ukraine, Tuesday, March 24, 2020. Ukraine has been under quarantine since March 12. 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/Efrem Lukatsky)

A view of the city bridge across the Dnipro River and the Left Bank, at sunset in Kyiv, Ukraine, Monday, March 23. 2020. Ukrainian authorities have ruled to close public transport from Monday to strengthen anti-coronavirus quarantine measures. 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/Efrem Lukatsky)