People enjoy themselves at an outdoor restaurant, amid the coronavirus outbreak, in central Stockholm, Sweden, Monday April 20, 2020. (Anders Wiklund/TT News Agency via AP)

A health worker takes a sample for a PCR test for the COVID-19 coronavirus at a hospital in Coslada, Spain, Monday, April 20, 2020. The Spanish government is starting to relax its confinement measures due to the COVID-19 coronavirus outbreak, trying to re-activate the economy after a two-week freeze and allowing children under 12 years-old to venture out to the streets for brief periods from next week. (AP Photo/Manu Fernandez)

A police vehicle is parked in front of a hotel in Zenica, central Bosnia, Monday, April 20, 2020. Several dozen people in Bosnia are on a hunger strike to protest being quarantined in a hotel on suspicion they might be carrying the new coronavirus. The group of some 80 Bosnians work abroad and when they returned to the country they were placed under a 28-day quarantine in a hotel in the central town of Zenica. (AP Photo/Almir Alic)

An elderly woman wearing a mask against the spread of the new coronavirus walks during a curfew in downtown Belgrade, Serbia, Tuesday, April 21, 2020. Serbia's elderly on Tuesday ventured outside their homes for the first time in more than a month as the authorities eased some of the strict measures that have been in place against the new coronavirus. Serbia has introduced some of the toughest rules in Europe as part of efforts to curb the spread of the virus. (AP Photo/Darko Vojinovic)

A man wearing a face mask walks past a portrait of former South African president Nelson Mandela on a mobile clinic at Lenasia South, south Johannesburg, South Africa, Tuesday, April 21, 2020, during a campaign aimed to combat the spread of the COVID-19 Coronavirus. (AP Photo/Themba Hadebe)

FILE - In this Sunday, March 15, 2020 file photo, a man sits, in an empty street in Barcelona, Spain. The European Union on Tuesday, April 21, 2020 says its vaunted tourism industry is facing decline due to the coronavirus crisis while Internal market Commissioner Thierry Breton says it should be the prime sector to receive over a fifth of all recovery funds. (AP Photo/Emilio Morenatti, File)

Volunteers for the Edible London food project remove the plastic packaging and check the quality of donated bananas to be put in food packs and delivered to residents who need it in the Haringey Council area, at a hub setup as a result of coronavirus inside the Alexandra Palace venue, in north London, Tuesday, April 21, 2020. The highly contagious COVID-19 coronavirus has impacted on nations around the globe, many imposing self isolation and exercising social distancing when people move from their homes. (AP Photo/Matt Dunham)

Nurse Cristina Settembrese fixes two masks to her face during her work shift in the COVID-19 ward at the San Paolo hospital in Milan, Italy, April 10, 2020. Settembrese spends her days caring for COVID-19 patients in a hospital ward, and when she goes home, her personal isolation begins by her own choice. (AP Photo/Luca Bruno)

A man walks along an empty street in downtown Barcelona, Spain, Monday, April 20, 2020 as the lockdown to combat the spread of coronavirus continues. (AP Photo/Emilio Morenatti)

Workers of the national ambulance center load a man who was deported from the United States two weeks ago and who is tested positive with the new coronavirus, to take him from the hotel he was being quarantined, to the hospital in Tabarre, Haiti, Sunday, April 19, 2020. (AP Photo/Dieu Nalio Chery)

People wearing a mask against the spread of the new coronavirus walk during a curfew in downtown Belgrade, Serbia, Tuesday, April 21, 2020. Serbia's elderly on Tuesday ventured outside their homes for the first time in more than a month as the authorities eased some of the strict measures that have been in place against the new coronavirus. Serbia has introduced some of the toughest rules in Europe as part of efforts to curb the spread of the virus. (AP Photo/Darko Vojinovic)

A health worker checks the temperature of a man queueing on a soccer field to be screened and tested for COVID-19 at Lenasia South, south Johannesburg, South Africa, Tuesday, April 21, 2020, during a campaign aimed to combat the spread of Coronavirus. (AP Photo/Themba Hadebe)

President Donald Trump listens as Treasury Secretary Steven Mnuchin speaks about the coronavirus in the James Brady Press Briefing Room of the White House, Tuesday, April 21, 2020, in Washington. (AP Photo/Alex Brandon)

Treasury Secretary Steven Mnuchin speaks about the coronavirus in the James Brady Press Briefing Room of the White House, Tuesday, April 21, 2020, in Washington. (AP Photo/Alex Brandon)

Volunteer doctors prepare to administer swabs for COVID-19 at a nursing home in Santa Marinella, near Rome, Tuesday, April 21, 2020. Italian Premier Giuseppe Conte on Tuesday confirmed that Italy can start reopening on May 4, but he doused any hopes of a total loosening of some of the strictest lockdown measures in a western democracy. (Mauro Scrobogna/LaPresse via AP)

People with ReopenNC gather in Raleigh, N.C., as they press Gov. Roy Cooper to allow businesses to reopen during the COVID-19 outbreak Tuesday, April 21, 2020. (AP Photo/Gerry Broome)

People wear protective face masks as they walk in Westminster in London, as the country is in lockdown to help curb the spread of coronavirus, Tuesday, April 21, 2020. (AP Photo/Kirsty Wigglesworth)

North Carolina Governor Roy Cooper speaks during a press briefing on the COVID-19 virus on Tuesday, April 21, 2020 at the Emergency Operations Center in Raleigh, N.C. (Robert Willett/The News & Observer via AP)

A person walks on a path towards the River Thames in Richmond, London, during the lockdown for the coronavirus, Tuesday, April 21, 2020. The highly contagious COVID-19 coronavirus has impacted on nations around the globe, many imposing self isolation and exercising social distancing when people move from their homes. (AP Photo/Matt Dunham)

People wearing protection masks as they across the 'Theresienwiese', the Oktoberfest beer festival area, in Munich, Germany, Tuesday, April 21, 2020. Bavarian state governor Markus Soeder and Munich mayor Dieter Reiter announced at a news conference that the Oktoberfest is cancelled this year because the coronavirus outbreak. (AP Photo/Matthias Schrader)