A man bikes by a street art mural, depicting a healthcare worker in a face mask by Belgian street artist CAZ, with a hashtag in Dutch that reads 'thank you', during a partial lockdown against the spread of Covid-19 in Wetteren, Belgium, Tuesday, March 31, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Virginia Mayo)