People take part in a ceremony to mark Israel's Memorial Day, commemorating fallen soldiers of Israel's wars and Israeli victims of hostile attacks, next to a monument at the Mount Herzl military cemetery in Jerusalem, April 13, 2021. REUTERS/Ronen Zvulun 

People take part in a ceremony to mark Israel's Memorial Day, commemorating fallen soldiers of Israel's wars and Israeli victims of hostile attacks, next to a monument at the Mount Herzl military cemetery in Jerusalem, April 13, 2021. REUTERS/Ronen Zvulun 

Scouts hold a torch during a ceremony to mark Israel's Memorial Day, commemorating fallen soldiers of Israel's wars and Israeli victims of hostile attacks, next to a monument at the Mount Herzl military cemetery in Jerusalem, April 13, 2021. REUTERS/Ronen Zvulun TPX IMAGES OF THE DAY 

People take part in a ceremony to mark Israel's Memorial Day, commemorating fallen soldiers of Israel's wars and Israeli victims of hostile attacks, next to a monument at the Mount Herzl military cemetery in Jerusalem, April 13, 2021. REUTERS/Ronen Zvulun 

Scouts hold a torch during a ceremony to mark Israel's Memorial Day, commemorating fallen soldiers of Israel's wars and Israeli victims of hostile attacks, next to a monument at the Mount Herzl military cemetery in Jerusalem, April 13, 2021. REUTERS/Ronen Zvulun 

A person takes part in a ceremony to mark Israel's Memorial Day, commemorating fallen soldiers of Israel's wars and Israeli victims of hostile attacks, next to a monument at the Mount Herzl military cemetery in Jerusalem, April 13, 2021. REUTERS/Ronen Zvulun 

A person wearing a face mask takes part in a ceremony to mark Israel's Memorial Day, commemorating fallen soldiers of Israel's wars and Israeli victims of hostile attacks, next to a monument at the Mount Herzl military cemetery in Jerusalem, April 13, 2021. REUTERS/Ronen Zvulun 

People take part in a ceremony to mark Israel's Memorial Day, commemorating fallen soldiers of Israel's wars and Israeli victims of hostile attacks, next to a monument at the Mount Herzl military cemetery in Jerusalem, April 13, 2021. REUTERS/Ronen Zvulun 

Scouts hold a torch during a ceremony to mark Israel's Memorial Day, commemorating fallen soldiers of Israel's wars and Israeli victims of hostile attacks, next to a monument at the Mount Herzl military cemetery in Jerusalem, April 13, 2021. REUTERS/Ronen Zvulun 

Israelis stand still as a siren sounds marking the beginning of Israel's Memorial Day, commemorating fallen soldiers of Israel's wars and Israeli victims of hostile attacks, in Tel Aviv, Israel April 13, 2021. REUTERS/Corinna Kern 

Israelis stand still as a siren sounds marking the beginning of Israel's Memorial Day, commemorating fallen soldiers of Israel's wars and Israeli victims of hostile attacks, in Tel Aviv, Israel April 13, 2021. REUTERS/Corinna Kern 

Israelis stand still as a siren sounds marking the beginning of Israel's Memorial Day, commemorating fallen soldiers of Israel's wars and Israeli victims of hostile attacks, in Tel Aviv, Israel April 13, 2021. REUTERS/Corinna Kern 

Israelis stand still as a siren sounds marking the beginning of Israel's Memorial Day, commemorating fallen soldiers of Israel's wars and Israeli victims of hostile attacks, in Tel Aviv, Israel April 13, 2021. REUTERS/Corinna Kern 

A crane is holding the north tower of Zagreb's Cathedral during its removal, due to the threat of collapsing after being heavily damaged during the earthquake of March 22, in Zagreb, Croatia, April 17, 2020. REUTERS/Antonio Bronic 

A health worker travels to a hospital on an exclusive and free bus as she faces a growing tide of hostility amid the spreading of coronavirus disease (COVID-19) continues in Mexico City, Mexico April 16, 2020. REUTERS/Edgard Garrido 

A bus driver wearing a protective mask travels to a hospital on an exclusive and free bus as health workers faces a growing tide of hostility amid the spreading of coronavirus disease (COVID-19) continues in Mexico City, Mexico April 15, 2020. Picture taken, April 15, 2020. REUTERS/Edgard Garrido 

Health workers travel to hospitals on an exclusive and free bus as they face a growing tide of hostility amid the spreading of coronavirus disease (COVID-19) continues in Mexico City, Mexico April 16, 2020. REUTERS/Edgard Garrido 

Carolina, a health worker, travels to a hospital on an exclusive and free bus as she faces a growing tide of hostility amid the spreading of coronavirus disease (COVID-19) continues in Mexico City, Mexico April 16, 2020. REUTERS/Edgard Garrido 

A health worker receives a protective mask before travels to a hospital on an exclusive and free bus as she faces a growing tide of hostility amid the spreading of coronavirus disease (COVID-19) continues in Mexico City, Mexico April 15, 2020. Picture taken, April 15, 2020. REUTERS/Edgard Garrido 

Damaso, a bus driver, travels to a hospital on an exclusive and free bus as health workers face a growing tide of hostility amid the spreading of coronavirus disease (COVID-19) continues in Mexico City, Mexico April 15, 2020. Picture taken, April 15, 2020. REUTERS/Edgard Garrido 

Cristina, a health worker, travels to a hospital on an exclusive and free bus as she faces a growing tide of hostility amid the spread of coronavirus disease (COVID-19) continues in Mexico City, Mexico April 16, 2020. REUTERS/Edgard Garrido 

A health worker travels to a hospital on an exclusive and free bus as she faces a growing tide of hostility amid the spread of coronavirus disease (COVID-19) continues in Mexico City, Mexico April 16, 2020. REUTERS/Edgard Garrido 

Health workers travel to hospitals on an exclusive and free bus as they face a growing tide of hostility amid the spread of coronavirus disease (COVID-19) continues in Mexico City, Mexico April 16, 2020. REUTERS/Edgard Garrido 

Social distance markings are seen on a street in London, as the spread of the coronavirus disease (COVID-19) continues, London, Britain, April 13, 2020. REUTERS/Hannah McKay 

A message is seen on the window of a shop in Margate as the spread of the coronavirus disease (COVID-19) continues, Margate, Britain, April 13, 2020. REUTERS/Andrew Couldridge 

General view of a sign near Lake Windermere, as the spread of the coronavirus disease (COVID-19) continues, Ambleside, Britain, April 13, 2020. REUTERS/Lee Smith 

REFILE - CORRECTING CAPTION A message is seen on the side of a beach shed in Margate as the spread of the coronavirus disease (COVID-19) continues, Margate, Britain, April 13, 2020. REUTERS/Andrew Couldridge 

REFILE - CORRECTING CAPTION A message is seen on the side of a beach shed in Margate as the spread of the coronavirus disease (COVID-19) continues, Margate, Britain, April 13, 2020. REUTERS/Andrew Couldridge 

A sign asking for people to stay at home is seen in Eyam, as the spread of the coronavirus disease (COVID-19) continues, Eyam, Britain, April 13, 2020. REUTERS/Carl Recine 

A sign asking for people to stay at home is seen in Eyam, as the spread of the coronavirus disease (COVID-19) continues, Eyam, Britain, April 13, 2020. REUTERS/Carl Recine 

A closure sign is seen at East Coast Beach, after all beaches were closed as part of measures to curb the spread of the coronavirus disease (COVID-19) in Singapore in Singapore, April 13, 2020. REUTERS/Edgar Su 

A notice is seen at the entrance of the Church of The Immaculate Conception and St Joseph in Hertford, as the spread of the coronavirus disease (COVID-19) continues, Hertford, Britain, April 12, 2020. REUTERS/Andrew Couldridge 

A sign reading "Covid 19, No Visitors please, Thank you" is seen in Holy Island, as the spread of the coronavirus disease (COVID-19) continues, Holy Island, Britain, April 12, 2020. REUTERS/Lee Smith 

A sign is seen in Bala as the spread of the coronavirus disease (COVID-19) continues, Bala, Gwynedd, Wales, Britain, April 11, 2020. REUTERS/Carl Recine 

A sign is seen in Bala as the spread of the coronavirus disease (COVID-19) continues, Bala, Gwynedd, Wales, Britain, April 11, 2020. REUTERS/Carl Recine 

A sign is seen in Bala as the spread of the coronavirus disease (COVID-19) continues, Bala, Gwynedd, Wales, Britain, April 11, 2020. REUTERS/Carl Recine 

A sign is seen in Bala as the spread of the coronavirus disease (COVID-19) continues, Bala, Gwynedd, Wales, Britain, April 11, 2020. REUTERS/Carl Recine 

A sign is seen in Bala as the spread of the coronavirus disease (COVID-19) continues, Bala, Gwynedd, Wales, Britain, April 11, 2020. REUTERS/Carl Recine 

A sign is seen in Bala as the spread of the coronavirus disease (COVID-19) continues, Bala, Gwynedd, Wales, Britain, April 11, 2020. REUTERS/Carl Recine 

A sign is seen in Bala as the spread of the coronavirus disease (COVID-19) continues, Bala, Gwynedd, Wales, Britain, April 11, 2020. REUTERS/Carl Recine 

A sign is seen left on a sidewalk near the Cathedral Church of St. John the Divine on Manhattan's Upper West Side which is being converted into a 400-bed temporary hospital during the outbreak of the coronavirus disease (COVID-19) in York City, New York, U.S., April 7, 2020. REUTERS/Brendan Mcdermid 

A fire burns in the exclusion zone around the Chernobyl nuclear power plant, outside the village of Rahivka, Ukraine April 5, 2020. Picture taken April 5, 2020. REUTERS/Yaroslav Yemelianenko 

Smoke rises from a forest fire in the exclusion zone around the Chernobyl nuclear power plant, outside the village of Rahivka, Ukraine April 5, 2020. Picture taken April 5, 2020. REUTERS/Yaroslav Yemelianenko 

A view shows an apartment block, which partially collapsed after an apparent gas explosion, in the town of Orekhovo-Zuyevo near Moscow, Russia April 4, 2020. REUTERS/Maxim Shemetov 

The gates of the closed construction site of a residential building are seen, amid the coronavirus disease (COVID-19) outbreak in Gennevilliers near Paris, France, April 2, 2020. REUTERS/Benoit Tessier 

A sign explaining the closure of a construction site of a residential building is pictured, amid the coronavirus disease (COVID-19) outbreak in Paris, France, April 2, 2020. REUTERS/Benoit Tessier 

A sign explaining the closure of a construction site of a residential building is pictured, amid the coronavirus disease (COVID-19) outbreak in Paris, France, April 2, 2020. REUTERS/Benoit Tessier 

A sign explaining the closure of a construction site of a residential building is pictured, amid the coronavirus disease (COVID-19) outbreak in Paris, France, April 2, 2020. REUTERS/Benoit Tessier 

A bench wrapped in shrink wrap to discourage people from gathering in groups because of coronavirus disease (COVID-19) outbreak is seen in Hamrun, Malta April 2, 2020. REUTERS/Darrin Zammit Lupi 

A bench wrapped in shrink wrap to discourage people from gathering in groups because of coronavirus disease (COVID-19) outbreak, is seen in Hamrun, Malta April 2, 2020. REUTERS/Darrin Zammit Lupi 

A bench wrapped in shrink wrap to discourage people from gathering in groups because of coronavirus disease (COVID-19) outbreak, is seen in Hamrun, Malta April 2, 2020. REUTERS/Darrin Zammit Lupi 

Signage is seen on the door of a local store, as the spread of the coronavirus disease (COVID-19) continues, Manchester, Britain, April 2, 2020. REUTERS/Phil Noble 

Signage is seen on the door of a local store, as the spread of the coronavirus disease (COVID-19) continues, Manchester, Britain, April 2, 2020. REUTERS/Phil Noble 

A staff member holds a sign advising visitors to avoid clustering at Jingshan Park, amid the novel coronavirus disease (COVID-19) outbreak in the country, in Beijing, China April 2, 2020. REUTERS/Tingshu Wang 

A sign is seen outside St Mary’s church as the spread of the coronavirus disease (COVID-19) continues, Princes Risborough, Britain, March 31, 2020. REUTERS/Eddie Keogh 

A sign is seen outside a shop in York as the spread of the coronavirus disease (COVID-19) continues, York, Britain, March 31, 2020. REUTERS/Lee Smith