Devotees gather for an evening prayer on the banks of the Ganges river during Kumbh Mela, or the Pitcher Festival, amidst the spread of the coronavirus disease (COVID-19), in Haridwar, India, April 12, 2021. REUTERS/Anushree Fadnavis

A medical worker holds a box containing vials of the EpiVacCorona vaccine against the coronavirus disease (COVID-19), developed by the Vector Institute in Siberia, at a local clinic in Saint Petersburg, Russia April 12, 2021. REUTERS/Anton Vaganov

A medical worker fills a syringe with a dose of the EpiVacCorona vaccine against the coronavirus disease (COVID-19), developed by the Vector Institute in Siberia, at a local clinic in Saint Petersburg, Russia April 12, 2021. REUTERS/Anton Vaganov

A man receives a dose of the EpiVacCorona vaccine against the coronavirus disease (COVID-19), developed by the Vector Institute in Siberia, at a local clinic in Saint Petersburg, Russia April 12, 2021. REUTERS/Anton Vaganov

A medical specialist holds a vial of the EpiVacCorona vaccine against the coronavirus disease (COVID-19), developed by the Vector Institute in Siberia, at a local clinic in Saint Petersburg, Russia April 12, 2021. REUTERS/Anton Vaganov

A demonstrator hugs a policeman as restaurant and small business owners take part in a protest calling for their businesses to be allowed to re-open, despite no authorization for the demonstration by the government, amid the coronavirus disease (COVID-19) outbreak, in Rome, Italy, April 12, 2021. REUTERS/Yara Nardi

Devotees gather for an evening prayer on the banks of the Ganges river during Kumbh Mela, or the Pitcher Festival, amidst the spread of the coronavirus disease (COVID-19), in Haridwar, India, April 12, 2021. REUTERS/Anushree Fadnavis

A medical specialist holds a vial of the EpiVacCorona vaccine against the coronavirus disease (COVID-19), developed by the Vector Institute in Siberia, at a local clinic in Saint Petersburg, Russia April 12, 2021. REUTERS/Anton Vaganov

Police officers confront demonstrators during a protest of restaurant and small business owners who call for their businesses to be allowed to re-open, despite no authorization for the demonstration by the government, amid the coronavirus disease (COVID-19) outbreak, in Rome, Italy, April 12, 2021. REUTERS/Guglielmo Mangiapane

A medical worker holds a box containing vials of the EpiVacCorona vaccine against the coronavirus disease (COVID-19), developed by the Vector Institute in Siberia, at a local clinic in Saint Petersburg, Russia April 12, 2021. REUTERS/Anton Vaganov

A demonstrator hugs a policeman as restaurant and small business owners take part in a protest calling for their businesses to be allowed to re-open, despite no authorization for the demonstration by the government, amid the coronavirus disease (COVID-19) outbreak, in Rome, Italy, April 12, 2021. REUTERS/Yara Nardi

Dutch tourists, who will spend a week long holiday in isolation in their tourist resort as part of an experiment, arrive at the Rhodes International Airport, amid the coronavirus disease (COVID-19) outbreak on the island of Rhodes, Greece April 12, 2021. REUTERS/Louiza Vradi

Dutch tourists, who will spend a week long holiday in isolation in their tourist resort as part of an experiment, arrive at the Rhodes International Airport, amid the coronavirus disease (COVID-19) outbreak on the island of Rhodes, Greece April 12, 2021. REUTERS/Louiza Vradi

Devotees are seen on the banks of the Ganges river during Kumbh Mela, or the Pitcher Festival, amidst the spread of the coronavirus disease (COVID-19), in Haridwar, India, April 12, 2021. REUTERS/Anushree Fadnavis

Restaurant and small business owners take part in a protest calling for their businesses to be allowed to re-open, despite no authorization for the demonstration by the government, amid the coronavirus disease (COVID-19) outbreak, in Rome, Italy, April 12, 2021. REUTERS/Yara Nardi

Demonstrators wearing protective face masks with flag of East Turkestan flag take part in a protest against China, in Ankara, Turkey April 12, 2021. REUTERS/Cagla Gurdogan

A demonstrator waves a flag of East Turkestan during a protest against China, in Ankara, Turkey April 12, 2021. REUTERS/Cagla Gurdogan

A demonstrator wearing a protective face mask with flag of East Turkestan flag takes part in a protest against China, in Ankara, Turkey April 12, 2021. REUTERS/Cagla Gurdogan

People hug at the Skylight rooftop bar as the coronavirus disease (COVID-19) restrictions ease, in London, Britain April 12, 2021. REUTERS/Dylan Martinez

A bartender works at the Skylight rooftop bar as the coronavirus disease (COVID-19) restrictions ease, in London, Britain April 12, 2021. REUTERS/Dylan Martinez

A medical worker fills a syringe with a dose of the EpiVacCorona vaccine against the coronavirus disease (COVID-19), developed by the Vector Institute in Siberia, at a local clinic in Saint Petersburg, Russia April 12, 2021. REUTERS/Anton Vaganov

Dutch tourists, who will spend a week long holiday in isolation in their tourist resort as part of an experiment, arrive at the Rhodes International Airport, amid the coronavirus disease (COVID-19) outbreak on the island of Rhodes, Greece April 12, 2021. REUTERS/Louiza Vradi

A dutch tourist, one of who will spend a week long holiday in isolation in their tourist resort as part of an experiment, arrives at the Rhodes International Airport, amid the coronavirus disease (COVID-19) outbreak on the island of Rhodes, Greece April 12, 2021. REUTERS/Louiza Vradi

A family wearing protective masks takes a selfie as the Petronas Twin Towers are seen in the background, amid the the coronavirus disease (COVID-19) pandemic, in Kuala Lumpur, Malaysia April 12, 2021. REUTERS/Lim Huey Teng

Dutch tourists, who will spend a week long holiday in isolation in their tourist resort as part of an experiment, arrive at the Rhodes International Airport, amid the coronavirus disease (COVID-19) outbreak on the island of Rhodes, Greece April 12, 2021. REUTERS/Louiza Vradi

Dutch tourists, who will spend a week long holiday in isolation in their tourist resort as part of an experiment, arrive at the Rhodes International Airport, amid the coronavirus disease (COVID-19) outbreak on the island of Rhodes, Greece April 12, 2021. REUTERS/Louiza Vradi

Dutch tourists, who will spend a week long holiday in isolation in their tourist resort as part of an experiment, arrive at the Rhodes International Airport, amid the coronavirus disease (COVID-19) outbreak on the island of Rhodes, Greece April 12, 2021. REUTERS/Louiza Vradi

Dutch tourists, who will spend a week long holiday in isolation in their tourist resort as part of an experiment, arrive at the Rhodes International Airport, amid the coronavirus disease (COVID-19) outbreak on the island of Rhodes, Greece April 12, 2021. REUTERS/Louiza Vradi

A woman receives a dose of the EpiVacCorona vaccine against the coronavirus disease (COVID-19), developed by the Vector Institute in Siberia, at a local clinic in Saint Petersburg, Russia April 12, 2021. REUTERS/Anton Vaganov

A woman receives a dose of the EpiVacCorona vaccine against the coronavirus disease (COVID-19), developed by the Vector Institute in Siberia, at a local clinic in Saint Petersburg, Russia April 12, 2021. REUTERS/Anton Vaganov

A man wearing a protective mask uses his phone as the Petronas Twin Towers are seen in the background, amid the the coronavirus disease (COVID-19) pandemic, in Kuala Lumpur, Malaysia April 12, 2021. REUTERS/Lim Huey Teng

Somali legislators of the lower house of parliament raise their hands to vote to extend President Mohamed Abdullahi Mohamed's term for another two years to let the country prepare for direct elections, in Mogadishu, Somalia April 12, 2021. REUTERS/Feisal Omar

Somali legislators of the lower house of parliament raise their hands to vote to extend President Mohamed Abdullahi Mohamed's term for another two years to let the country prepare for direct elections, in Mogadishu, Somalia April 12, 2021. REUTERS/Feisal Omar

Somali legislators of the lower house of parliament attend a vote to extend President Mohamed Abdullahi Mohamed's term for another two years to let the country prepare for direct elections, in Mogadishu, Somalia April 12, 2021. REUTERS/Feisal Omar

Somali legislators of the lower house of parliament raise their hands to vote to extend President Mohamed Abdullahi Mohamed's term for another two years to let the country prepare for direct elections, in Mogadishu, Somalia April 12, 2021. REUTERS/Feisal Omar

Somali legislators of the lower house of parliament raise their hands to vote to extend President Mohamed Abdullahi Mohamed's term for another two years to let the country prepare for direct elections, in Mogadishu, Somalia April 12, 2021. REUTERS/Feisal Omar

Somali legislators of the lower house of parliament attend a vote to extend President Mohamed Abdullahi Mohamed's term for another two years to let the country prepare for direct elections, in Mogadishu, Somalia April 12, 2021. REUTERS/Feisal Omar

A view of the city skyline in Kuala Lumpur amid the coronavirus disease (COVID-19) pandemic, in Malaysia April 12, 2021. REUTERS/Lim Huey Teng

A man wearing a protective mask looks on as the Petronas Twin Towers are seen in the background, amid the the coronavirus disease (COVID-19) pandemic, in Kuala Lumpur, Malaysia April 12, 2021. REUTERS/Lim Huey Teng

A demonstrator looks on during a protest of restaurant and small business owners who call for their businesses to be allowed to re-open, despite no authorization for the demonstration by the government, amid the coronavirus disease (COVID-19) outbreak, in Rome, Italy, April 12, 2021. REUTERS/Guglielmo Mangiapane

Northwestern Medicine cardiologist Dr. Jonathan Rich describes to the jury members the function of the lungs as he answers questions during the eleventh day of the trial of former Minneapolis police officer Derek Chauvin for second-degree murder, third-degree murder and second-degree manslaughter in the death of George Floyd in Minneapolis, Minnesota, U.S. April 12, 2021 in a still image from video. Pool via REUTERS

Northwestern Medicine cardiologist Dr. Jonathan Rich describes to the jury members the function of the lungs as he answers questions during the eleventh day of the trial of former Minneapolis police officer Derek Chauvin for second-degree murder, third-degree murder and second-degree manslaughter in the death of George Floyd in Minneapolis, Minnesota, U.S. April 12, 2021 in a still image from video. Pool via REUTERS

U.S. Ambassador to Jordan Henry Wooster attends a presser during his visit to a medical center at Baqaa Palestinian refugee camp, near Amman, Jordan April 12, 2021. REUTERS/Muath Freij

A Palestinian refugee man receives the COVID-19 vaccine inside a medical center at Baqaa refugee camp, near Amman, Jordan April 12, 2021. REUTERS/Muath Freij

U.S. Ambassador to Jordan Henry Wooster poses for a picture with girls welcoming his visit to Baqaa Palestinian refugee camp, near Amman, Jordan April 12, 2021. REUTERS/Muath Freij

U.S. Ambassador to Jordan Henry Wooster stands near UNRWA Commissioner-General Philippe Lazzarini, during his visit to a medical center at Baqaa Palestinian refugee camp, near Amman, Jordan April 12, 2021. REUTERS/Muath Freij

U.S. Ambassador to Jordan Henry Wooster stands near UNRWA Commissioner-General Philippe Lazzarini, during his visit to a medical center at Baqaa Palestinian refugee camp, near Amman, Jordan April 12, 2021. REUTERS/Muath Freij

A Palestinian refugee man receives the COVID-19 vaccine inside a medical center at Baqaa refugee camp, near Amman, Jordan April 12, 2021. REUTERS/Muath Freij

A Palestinian refugee man prepares to receive the COVID-19 vaccine inside a medical center at Baqaa refugee camp, near Amman, Jordan April 12, 2021. REUTERS/Muath Freij

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, April 12, 2021. REUTERS/Staff

People enjoy a drink at the Skylight rooftop bar as the coronavirus disease (COVID-19) restrictions ease, in London, Britain April 12, 2021. REUTERS/Dylan Martinez

A firefighter works to extinguish a fire at the Nevskaya Manufaktura factory in central Saint Petersburg, Russia April 12, 2021. REUTERS/Anton Vaganov

Restaurant and small business owners take part in a protest calling for their businesses to be allowed to re-open, despite no authorization for the demonstration by the government, amid the coronavirus disease (COVID-19) outbreak, in Rome, Italy, April 12, 2021. REUTERS/Yara Nardi

People watch as flames and smoke rise during a fire at the Nevskaya Manufaktura factory in central Saint Petersburg, Russia April 12, 2021. REUTERS/Anton Vaganov

People enjoy a drink at the Skylight rooftop bar as the coronavirus disease (COVID-19) restrictions ease, in London, Britain April 12, 2021. REUTERS/Dylan Martinez

Firefighters work to extinguish a fire at the Nevskaya Manufaktura factory in central Saint Petersburg, Russia April 12, 2021. REUTERS/Anton Vaganov

A firefighter works to extinguish a fire at the Nevskaya Manufaktura factory in central Saint Petersburg, Russia April 12, 2021. REUTERS/Anton Vaganov

People sit at the Skylight rooftop bar as the coronavirus disease (COVID-19) restrictions ease, in London, Britain April 12, 2021. REUTERS/Dylan Martinez

Police officers stand as people stroll on the Long Walk outside Windsor Castle after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 11, 2021. REUTERS/Peter Cziborra