A view of the front pages of Britain's newspapers showing their coverage of the coronavirus, in London, Thursday, April 2, 2020. Newspapers in Britain have criticised the lack of testing NHS staff for the virus. 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/Kirsty Wigglesworth)

In this Wednesday, April 1, 2020 photo, Scott Dunn shows a visitor the different grades of maple syrup produced this season at the Dunn Family Maple sugar house in Buxton, Maine. Maple syrup producers are dealing with several setbacks after the coronavirus outbreak including the recent cancelation of Maple Syrup Sunday. (AP Photo/Robert F. Bukaty)

A railway employee sits in the corner of a deserted railway station during a 21 day lockdown to control the spread of coronavirus in New Delhi, India, Thursday, April 2, 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/Manish Swarup)

Commuters wearing face masks to protect themselves from the new coronavirus are reflected in a mirror at a skytrain station in Bangkok, Thailand, Friday, April 3, 2020. Thailand's prime minister announced a nationwide 10 p.m.-to-4 a.m curfew starting Friday to combat the spread of the coronavirus. 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/Sakchai Lalit)

A woman walks through an empty pedestrian crossing in the Ginza shopping district Friday, April 3, 2020, in Tokyo. 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/Eugene Hoshiko)

In this Thursday, April 2, 2020, photo, a man assists a woman with her belongings as they cross the expressway gate at the border of Wuhan city in central China's Hubei province. Millions of Chinese workers are streaming back to factories, shops and offices but many still face anti-coronavirus controls that add to their financial losses and aggravation. In Wuhan police require a health check and documents from employers for returning workers. (AP Photo/Ng Han Guan)