Police officers wearing face masks to protect against the spread of new coronavirus sit on motorcycles near a toll gate for vehicles entering and exiting Wuhan in central China's Hubei Province, Wednesday, April 8, 2020. After 11 weeks of lockdown, the first train departed Wednesday morning from a re-opened Wuhan, the origin point for the coronavirus pandemic, as residents once again were allowed to travel in and out of the sprawling central Chinese city. (AP Photo/Ng Han Guan)

Police officers wearing face masks to protect against the spread of new coronavirus stand near a toll gate for vehicles entering and exiting Wuhan in central China's Hubei Province, Wednesday, April 8, 2020. After 11 weeks of lockdown, the first train departed Wednesday morning from a re-opened Wuhan, the origin point for the coronavirus pandemic, as residents once again were allowed to travel in and out of the sprawling central Chinese city. (AP Photo/Ng Han Guan)

FiLE - In this Wednesday, May 23, 2018, file photo, white markers, each indicating a mass grave of about 150 people, are displayed on Hart Island in New York. On Monday, April 6, 2020, New York City Mayor Bill de Blasio said that officials are exploring the possibility of temporarily burying coronavirus victims on Hart Island, a one-mile, limited access strip off the Bronx borough of New York that has long served as the city's potter's field. The mayor told TV station NY1 that under such a contingency plan, bodies of COVID-19 victims would be buried individually, not in mass graves, so families could later reclaim them. (AP Photo/Seth Wenig, File)

President Donald Trump speaks about the coronavirus in the James Brady Press Briefing Room of the White House, Tuesday, April 7, 2020, in Washington. (AP Photo/Alex Brandon)

Passengers wearing face masks and rain coats to protect against the spread of new coronavirus walk outside of Hankou train station after of the resumption of train services in Wuhan in central China's Hubei Province, Wednesday, April 8, 2020. After 11 weeks of lockdown, the first train departed Wednesday morning from a re-opened Wuhan, the origin point for the coronavirus pandemic, as residents once again were allowed to travel in and out of the sprawling central Chinese city. (AP Photo/Ng Han Guan)

Passengers wearing face masks to protect against the spread of new coronavirus board the first high-speed train to leave Hankou train station after the resumption of train services in Wuhan in central China's Hubei Province, Wednesday, April 8, 2020. After 11 weeks of lockdown, the first train departed Wednesday morning from a re-opened Wuhan, the origin point for the coronavirus pandemic, as residents once again were allowed to travel in and out of the sprawling central Chinese city. (AP Photo/Ng Han Guan)

Lighter than normal traffic flow in and out downtown Atlanta Monday, April 6, 2020. Gov. Brian Kemp has issued an order to shelter in place in hopes of slowing the spread of the coronavirus. (AP Photo/John Bazemore)

A doctor, wearing full protective equipment, takes notes as he screens a patient with symptoms of coronavirus at the polyclinic Klinicare during a partial lockdown against the spread of Covid-19 in Brussels, Monday, April 6, 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/Francisco Seco)

Texas National Guard Specialist Justin Garcia, from left, Taylor Frasier and Dietrich Schilberg, right, of the 1st Battalion, Airborne, 143rd Infantry Regiment out of Huntsville, Texas, assemble kid meals at the North Texas Food Bank in Plano, Texas, Tuesday, April 7, 2020. Like most governors, Gov. Greg Abbott activated the state National Guard in the face of mounting coronavirus cases to assist with drive-thru testing and supply deliveries. (AP Photo/Tony Gutierrez)

Cars drive past an electronic billboard reading "Stay home, take care of yourself and your loved ones" is displayed in an almost empty Prospect Mira (Peace's Avenue) in Moscow, Russia, Tuesday, April 7, 2020. Putin asked experts whether it would be possible to lift some of the restrictions earlier to ease the pain for the economy. They said next week would show if the lockdown has helped. 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/Alexander Zemlianichenko)

A man walks along the Saone river during a nationwide confinement to counter the COVID-19, on the Barbe island in Lyon, central France, Tuesday, April 7, 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/Laurent Cipriani)

Passengers wearing face masks to protect against the spread of the new coronavirus ride on a train in Yokohama near Tokyo, Wednesday, April 8, 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/Koji Sasahara)