Medical workers wearing protective face masks accompany a resident during a relaxation session at the "la maison du moulin" retirement home (EHPAD - Housing Establishment for Dependent Elderly People), amid the coronavirus disease (COVID-19) pandemic, in Maubeuge, France, May 7, 2021. Picture taken May 7, 2021. REUTERS/Pascal Rossignol

People relax on the sandy beach which is undergoing extensive cleaning at Ghadira Bay in Mellieha, as Malta may be one of the countries added to a 'green' list where UK travellers will be able to visit with a negative coronavirus disease (COVID-19) test to be shown before travel but no quarantine needed after returning from holiday, Malta May 4, 2021. REUTERS/Darrin Zammit Lupi

People relax on the sandy beach at Golden Bay outside Mellieha, as Malta may be one of the countries added to a 'green' list where UK travellers will be able to visit with a negative coronavirus disease (COVID-19) test to be shown before travel but no quarantine needed after returning from holiday, Malta May 4, 2021. REUTERS/Darrin Zammit Lupi

People relax on the sandy beach at Golden Bay outside Mellieha, as Malta may be one of the countries added to a 'green' list where UK travellers will be able to visit with a negative coronavirus disease (COVID-19) test to be shown before travel but no quarantine needed after returning from holiday, Malta May 4, 2021. REUTERS/Darrin Zammit Lupi

People relax on the sandy beach at Golden Bay outside Mellieha, as Malta may be one of the countries added to a 'green' list where UK travellers will be able to visit with a negative Covid-19 test to be shown before travel but no quarantine needed after returning from holiday, Malta May 4, 2021. REUTERS/Darrin Zammit Lupi

People relax on the sandy beach which is undergoing extensive cleaning at Ghadira Bay in Mellieha, as Malta may be one of the countries added to a 'green' list where UK travellers will be able to visit with a negative coronavirus disease (COVID-19) test to be shown before travel but no quarantine needed after returning from holiday, Malta May 4, 2021. REUTERS/Darrin Zammit Lupi??

People relax at the Upper Barrakka Gardens overlooking Grand Harbour in Valletta, as Malta may be one of the countries added to a 'green' list where UK travellers will be able to visit with a negative Covid-19 test to be shown before travel but no quarantine needed after returning from holiday, Malta May 4, 2021. REUTERS/Darrin Zammit Lupi

Rohan Aggarwal, 26, a resident doctor treating patients suffering from the coronavirus disease (COVID-19), takes off personal protective equipment during his 27-hour shift at Holy Family Hospital in New Delhi, India, May 2, 2021. Aggarwal says he fears what will happen if he gets infected, too, knowing that his own hospital will be unlikely to find him a bed. He is unvaccinated: He was sick in January when shots for medical professionals were being rolled out, and then by February, he began to relax. "We were all under the misconception the virus had gone," he said. REUTERS/Danish Siddiqui SEARCH "SIDDIQUI AGGARWAL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Rohan Aggarwal, 26, a resident doctor treating patients suffering from the coronavirus disease (COVID-19), eats breakfast with his colleagues inside the canteen, during his 27-hour shift at Holy Family Hospital in New Delhi, India, May 2, 2021. Aggarwal says he fears what will happen if he gets infected, too, knowing that his own hospital will be unlikely to find him a bed. He is unvaccinated: He was sick in January when shots for medical professionals were being rolled out, and then by February, he began to relax. "We were all under the misconception the virus had gone," he said. REUTERS/Danish Siddiqui SEARCH "SIDDIQUI AGGARWAL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Rohan Aggarwal, 26, a resident doctor treating patients suffering from the coronavirus disease (COVID-19), washes his hands before having breakfast inside the canteen, during his 27-hour shift at Holy Family Hospital in New Delhi, India, May 2, 2021. Aggarwal says he fears what will happen if he gets infected, too, knowing that his own hospital will be unlikely to find him a bed. He is unvaccinated: He was sick in January when shots for medical professionals were being rolled out, and then by February, he began to relax. "We were all under the misconception the virus had gone," he said. REUTERS/Danish Siddiqui SEARCH "SIDDIQUI AGGARWAL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Rohan Aggarwal, 26, a resident doctor treating patients suffering from the coronavirus disease (COVID-19), tends to a patient inside the emergency room of Holy Family Hospital, during his 27-hour shift in New Delhi, India, May 1, 2021. Aggarwal says he fears what will happen if he gets infected, too, knowing that his own hospital will be unlikely to find him a bed. He is unvaccinated: He was sick in January when shots for medical professionals were being rolled out, and then by February, he began to relax. "We were all under the misconception the virus had gone," he said. REUTERS/Danish Siddiqui TPX IMAGES OF THE DAY SEARCH "SIDDIQUI AGGARWAL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Rohan Aggarwal, 26, a resident doctor who treats patients suffering from coronavirus disease (COVID-19), poses for a photograph as he arrives for a 27-hour shift at Holy Family Hospital in New Delhi, India, May 1, 2021. Aggarwal says he fears what will happen if he gets infected, too, knowing that his own hospital will be unlikely to find him a bed. He is unvaccinated: He was sick in January when shots for medical professionals were being rolled out, and then by February, he began to relax. "We were all under the misconception the virus had gone," he said. REUTERS/Danish Siddiqui SEARCH "SIDDIQUI AGGARWAL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

A woman relaxes at the Szechenyi thermal bath as the coronavirus disease (COVID-19) restrictions are eased for those who have COVID-19 immunity card, in Budapest, Hungary, May 1, 2021. REUTERS/Bernadett Szabo

Bathers relax at the Szechenyi thermal bath as the coronavirus disease (COVID-19) restrictions are eased for those who have COVID-19 immunity card, in Budapest, Hungary, May 1, 2021. REUTERS/Bernadett Szabo

A man relaxes at the Szechenyi thermal bath as the coronavirus disease (COVID-19) restrictions are eased for those who have COVID-19 immunity card, in Budapest, Hungary, May 1, 2021. REUTERS/Bernadett Szabo

A woman relaxes at the Szechenyi thermal bath as the coronavirus disease (COVID-19) restrictions are eased for those who have COVID-19 immunity card, in Budapest, Hungary, May 1, 2021. REUTERS/Bernadett Szabo

A man relaxes at the Szechenyi thermal bath as the coronavirus disease (COVID-19) restrictions are eased for those who have COVID-19 immunity card, in Budapest, Hungary, May 1, 2021. REUTERS/Bernadett Szabo

Bathers relax at the Szechenyi thermal bath as the coronavirus disease (COVID-19) restrictions are eased for those who have COVID-19 immunity card, in Budapest, Hungary, May 1, 2021. REUTERS/Bernadett Szabo

People relax in the sunshine, as lockdown restrictions are eased amidst the spread of the coronavirus disease (COVID-19) pandemic in St. James's Park, London, Britain, April 24, 2021. REUTERS/Toby Melville

People relax in the sunshine, as lockdown restrictions are eased amidst the spread of the coronavirus disease (COVID-19) pandemic in St. James's Park, London, Britain, April 24, 2021. REUTERS/Toby Melville

People relax in the sunshine, as lockdown restrictions are eased amidst the spread of the coronavirus disease (COVID-19) pandemic in Soho, London, Britain, April 24, 2021. REUTERS/Toby Melville

People relax in a park on a sunny day in Gaasbeek, Belgium April 24, 2021. REUTERS/Yves Herman

Employees of Michelin-starred "Marco Martini" carry a table as owners prepare outdoor dining in order to be ready for April 26 when restrictions to contain the spread of the coronavirus disease (COVID-19) will relax and people can dine outside, in Rome, Italy, April 23, 2021. REUTERS/Yara Nardi

Chef Marco Martini, owner of one-Michelin-starred "Marco Martini" restaurant, walks on the restaurant terrace as owners prepare outdoor dining in order to be ready for April 26 when restrictions to contain the spread of the coronavirus disease (COVID-19) will relax and people can dine outside, in Rome, Italy, April 23, 2021. REUTERS/Yara Nardi

An employee of Michelin-starred "Marco Martini" restaurant carries a chair as owners prepare outdoor dining in order to be ready for April 26 when restrictions to contain the spread of the coronavirus disease (COVID-19) will relax and people can dine outside, in Rome, Italy, April 23, 2021. REUTERS/Yara Nardi

An employee of Michelin-starred "Marco Martini" restaurant uses a tape measure to check the distance between tables as owners prepare outdoor dining in order to be ready for April 26 when restrictions to contain the spread of the coronavirus disease (COVID-19) will relax and people can dine outside, in Rome, Italy, April 23, 2021. REUTERS/Yara Nardi

Employees of Michelin-starred "Marco Martini" restaurant are seen during the reorganisation of the restaurant as owners prepare outdoor dining in order to be ready for April 26 when restrictions to contain the spread of the coronavirus disease (COVID-19) will relax and people can dine outside, in Rome, Italy, April 23, 2021. REUTERS/Yara Nardi

An employee of Michelin-starred "Marco Martini" restaurant works in the kitchen during the reorganisation of the restaurant, as owners prepare outdoor dining in order to be ready for April 26 when restrictions to contain the spread of the coronavirus disease (COVID-19) will relax and people can dine outside, in Rome, Italy, April 23, 2021. REUTERS/Yara Nardi

Chef Marco Martini, owner of one-Michelin-starred "Marco Martini" restaurant, makes fresh pasta as owners prepare outdoor dining in order to be ready for April 26 when restrictions to contain the spread of the coronavirus disease (COVID-19) will relax and people can dine outside, in Rome, Italy, April 23, 2021. REUTERS/Yara Nardi

Chef Marco Martini, owner of one-Michelin-starred "Marco Martini" restaurant, makes fresh pasta as owners prepare outdoor dining in order to be ready for April 26 when restrictions to contain the spread of the coronavirus disease (COVID-19) will relax and people can dine outside, in Rome, Italy, April 23, 2021. REUTERS/Yara Nardi

People relax on bank of the River Thames, as coronavirus disease (COVID-19) lockdown restrictions ease in Richmond, London, Britain, April 18, 2021. REUTERS/Henry Nicholls

People relax on bank of the River Thames, as coronavirus disease (COVID-19) lockdown restrictions ease in Richmond, London, Britain, April 18, 2021. REUTERS/Henry Nicholls

People relax at Trafalgar Square as the coronavirus disease (COVID-19) restrictions ease, in London, Britain, April 17, 2021. REUTERS/Henry Nicholls

People relax at Trafalgar Square as the coronavirus disease (COVID-19) restrictions ease, in London, Britain, April 17, 2021. REUTERS/Henry Nicholls

People relax at Trafalgar Square as the coronavirus disease (COVID-19) restrictions ease, in London, Britain, April 17, 2021. REUTERS/Henry Nicholls

People relax at Trafalgar Square as the coronavirus disease (COVID-19) restrictions ease, in London, Britain, April 17, 2021. REUTERS/Henry Nicholls

People visit the Autry Museum of the American West, after LA County relaxed its coronavirus disease (COVID-19) restrictions, in Los Angeles, California, U.S., April 6, 2021. REUTERS/Lucy Nicholson

A man visits the Autry Museum of the American West, after LA County relaxed its coronavirus disease (COVID-19) restrictions, in Los Angeles, California, U.S., April 6, 2021. REUTERS/Lucy Nicholson

A man visits the Autry Museum of the American West, after LA County relaxed its coronavirus disease (COVID-19) restrictions, in Los Angeles, California, U.S., April 6, 2021. REUTERS/Lucy Nicholson

People visit the Autry Museum of the American West, after LA County relaxed its coronavirus disease (COVID-19) restrictions, in Los Angeles, California, U.S., April 6, 2021. REUTERS/Lucy Nicholson

A woman visits the Autry Museum of the American West, after LA County relaxed its coronavirus disease (COVID-19) restrictions, in Los Angeles, California, U.S., April 6, 2021. REUTERS/Lucy Nicholson

People relax during sunny weather in Hyde Park, amid the coronavirus disease (COVID-19) outbreak, in London, Britain, April 4, 2021. REUTERS/Henry Nicholls

People relax during sunny weather in Hyde Park, amid the coronavirus disease (COVID-19) outbreak, in London, Britain, April 4, 2021. REUTERS/Henry Nicholls

People relax during sunny weather in Hyde Park, amid the coronavirus disease (COVID-19) outbreak, in London, Britain, April 4, 2021. REUTERS/Henry Nicholls

People relax during sunny weather in Hyde Park, amid the coronavirus disease (COVID-19) outbreak, in London, Britain, April 4, 2021. REUTERS/Henry Nicholls

People relax during sunny weather in Hyde Park, amid the coronavirus disease (COVID-19) outbreak, in London, Britain, April 4, 2021. REUTERS/Henry Nicholls

People relax during sunny weather in Hyde Park, amid the coronavirus disease (COVID-19) outbreak, in London, Britain, April 4, 2021. REUTERS/Henry Nicholls

People spend the night in a park as COVID-19 restrictions in the Lazio region are slightly relaxed, in Rome, Italy March 31, 2021. REUTERS/Yara Nardi

People wearing protective masks walk in front of the Trevi's Fountain as COVID-19 restrictions in the Lazio region are slightly relaxed, in Rome, Italy March 30, 2021. REUTERS/Yara Nardi

A man walks in the street as COVID-19 restrictions in the Lazio region are slightly relaxed, in Rome, Italy March 30, 2021. REUTERS/Yara Nardi

People wearing protective masks walk past closed shops as COVID-19 restrictions in the Lazio region are slightly relaxed, in Rome, Italy March 30, 2021. REUTERS/Yara Nardi

A dog looks at a shop as COVID-19 restrictions in the Lazio region are slightly relaxed, in Rome, Italy March 30, 2021. REUTERS/Yara Nardi

People sit in front of Trevi's Fountain as COVID-19 restrictions in the Lazio region are slightly relaxed, in Rome, Italy March 30, 2021. REUTERS/Yara Nardi

People relax inside circles painted by local authorities at Saint Peter's Square (Sint-Pietersplein) to encourage respect in social distancing amid the coronavirus (COVID-19) outbreak, in Ghent, Belgium March 29, 2021. Picture taken with a drone on March 29, 2021. REUTERS/Bart Biesemans

People relax inside circles painted by local authorities at Saint Peter's Square (Sint-Pietersplein) to encourage respect in social distancing amid the coronavirus (COVID-19) outbreak, in Ghent, Belgium March 29, 2021. Picture taken with a drone on March 29, 2021. REUTERS/Bart Biesemans

People relax inside circles painted by local authorities at Saint Peter's Square (Sint-Pietersplein) to encourage respect in social distancing amid the coronavirus (COVID-19) outbreak, in Ghent, Belgium March 29, 2021. Picture taken with a drone on March 29, 2021. REUTERS/Bart Biesemans

People relax inside circles painted by local authorities at Saint Peter's Square (Sint-Pietersplein) to encourage respect in social distancing amid the coronavirus (COVID-19) outbreak, in Ghent, Belgium March 29, 2021. Picture taken with a drone on March 29, 2021. REUTERS/Bart Biesemans

People relax inside circles painted by local authorities at Saint Peter's Square (Sint-Pietersplein) to encourage respect in social distancing amid the coronavirus (COVID-19) outbreak, in Ghent, Belgium March 29, 2021. Picture taken March 29, 2021. REUTERS/Bart Biesemans

People relax inside circles painted by local authorities at Saint Peter's Square (Sint-Pietersplein) to encourage respect in social distancing amid the coronavirus (COVID-19) outbreak, in Ghent, Belgium March 29, 2021. Picture taken with a drone on March 29, 2021. REUTERS/Bart Biesemans

Police officers watch as people relax inside circles painted by local authorities at Saint Peter's Square (Sint-Pietersplein) to encourage respect in social distancing amid the coronavirus (COVID-19) outbreak, in Ghent, Belgium March 29, 2021. Picture taken March 29, 2021. REUTERS/Bart Biesemans