A worker brings drinks to customers after The Fox on the Hill pub reopening, as the coronavirus disease (COVID-19) restrictions ease, in London, Britain April 12, 2021. REUTERS/Hannah Mckay

A person swims in a pool as swimming pools reopen following easing of the coronavirus disease (COVID-19) restrictions, at Clissold Leisure Centre, in London, Britain April 12, 2021. REUTERS/John Sibley

A worker prepares a drink after The Fox on the Hill pub reopening, as the coronavirus disease (COVID-19) restrictions ease, in London, Britain April 12, 2021. REUTERS/Hannah Mckay

A worker pours a drink after The Fox on the Hill pub reopening, as the coronavirus disease (COVID-19) restrictions ease, in London, Britain April 12, 2021. REUTERS/Hannah Mckay

A worker of The Fox on the Hill pub carries drinks after its reopening, as the coronavirus disease (COVID-19) restrictions ease, in London, Britain April 12, 2021. REUTERS/Hannah Mckay

A worker of The Fox on the Hill pub pours drinks after its reopening, as the coronavirus disease (COVID-19) restrictions ease, in London, Britain April 12, 2021. REUTERS/Hannah Mckay

Synchronised swimmers from Aquabatix pose for a picture during training as swimming pools reopen following easing of the coronavirus disease (COVID-19) restrictions, at Clissold Leisure Centre, in London, Britain April 12, 2021. REUTERS/John Sibley

A worker of The Fox on the Hill pub pours drinks after its reopening, as the coronavirus disease (COVID-19) restrictions ease, in London, Britain April 12, 2021. REUTERS/Hannah Mckay

Members of police wearing protective face masks stand guard as people wait to enter the Lokmanya Tilak Terminus railway station, amid the spread of the coronavirus disease (COVID-19) in Mumbai, India, April 12, 2021. REUTERS/Niharika Kulkarni

People queue outside a shop on Carnaby street, as the coronavirus disease (COVID-19) restrictions ease, in London, Britain April 12, 2021. REUTERS/Henry Nicholls

People wearing protective face masks wait to enter the Lokmanya Tilak Terminus railway station, amid the spread of the coronavirus disease (COVID-19) in Mumbai, India, April 12, 2021. REUTERS/Niharika Kulkarni

Policemen wearing protective face masks ask people to sit while waiting to enter the Lokmanya Tilak Terminus railway station, amid the spread of the coronavirus disease (COVID-19) in Mumbai, India, April 12, 2021. REUTERS/Niharika Kulkarni

Police officers stand outside Windsor Castle after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain April 12, 2021. REUTERS/Peter Cziborra

Windsor Castle wardens stand outside after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain April 12, 2021. REUTERS/Peter Cziborra

People wait in a line to enter the Lokmanya Tilak Terminus railway station, amid the spread of the coronavirus disease (COVID-19) in Mumbai, India, April 12, 2021. REUTERS/Niharika Kulkarni

People wait in a line to enter the Lokmanya Tilak Terminus railway station, amid the spread of the coronavirus disease (COVID-19) in Mumbai, India, April 12, 2021. REUTERS/Niharika Kulkarni

Synchronised swimmers from Aquabatix train in the pool as swimming pools reopen following easing of the coronavirus disease (COVID-19) restrictions, at Clissold Leisure Centre, in London, Britain April 12, 2021. REUTERS/John Sibley

Synchronised swimmers from Aquabatix train in the pool as swimming pools reopen following easing of the coronavirus disease (COVID-19) restrictions, at Clissold Leisure Centre, in London, Britain April 12, 2021. REUTERS/John Sibley

Synchronised swimmers from Aquabatix train in the pool as swimming pools reopen following easing of the coronavirus disease (COVID-19) restrictions, at Clissold Leisure Centre, in London, Britain April 12, 2021. REUTERS/John Sibley

A Naga Sadhu, or Hindu holy man, waits before the procession for taking a dip in the Ganges river during Shahi Snan at "Kumbh Mela", or the Pitcher Festival, amidst the spread of the coronavirus disease (COVID-19), in Haridwar, India, April 12, 2021. REUTERS/Danish Siddiqui

Naga Sadhus, or Hindu holy men get ready before the procession for taking a dip in the Ganges river during Shahi Snan at "Kumbh Mela", or the Pitcher Festival, amidst the spread of the coronavirus disease (COVID-19), in Haridwar, India, April 12, 2021. REUTERS/Danish Siddiqui

Naga Sadhus, or Hindu holy men, wait before the procession for taking a dip in the Ganges river during Shahi Snan at "Kumbh Mela", or the Pitcher Festival, amidst the spread of the coronavirus disease (COVID-19), in Haridwar, India, April 12, 2021. REUTERS/Danish Siddiqui

A Naga Sadhu, or Hindu holy man waits before the procession for taking a dip in the Ganges river during Shahi Snan at "Kumbh Mela", or the Pitcher Festival, amidst the spread of the coronavirus disease (COVID-19), in Haridwar, India, April 12, 2021. REUTERS/Danish Siddiqui

A Naga Sadhu, or Hindu holy man waits before the procession for taking a dip in the Ganges river during Shahi Snan at "Kumbh Mela", or the Pitcher Festival, amidst the spread of the coronavirus disease (COVID-19), in Haridwar, India, April 12, 2021. REUTERS/Danish Siddiqui

Naga Sadhus, or Hindu holy men wait before the procession for taking a dip in the Ganges river during Shahi Snan at "Kumbh Mela", or the Pitcher Festival, amidst the spread of the coronavirus disease (COVID-19), in Haridwar, India, April 12, 2021. REUTERS/Danish Siddiqui

A Naga Sadhu, or Hindu holy man waits before the procession for taking a dip in the Ganges river during Shahi Snan at "Kumbh Mela", or the Pitcher Festival, amidst the spread of the coronavirus disease (COVID-19), in Haridwar, India, April 12, 2021. REUTERS/Danish Siddiqui

Customers walk with shopping bags, as retail store Primark in Birmingham, Britain reopens its doors after a third lockdown imposed in early January due to the ongoing coronavirus disease (COVID-19) pandemic, April 12, 2021. REUTERS/Carl Recine

People stand outside a shop on Oxford street, as the coronavirus disease (COVID-19) restrictions ease, in London, Britain April 12, 2021. REUTERS/Henry Nicholls

A worker prepares a shop before they open, as the coronavirus disease (COVID-19) restrictions ease, in London, Britain April 12, 2021. REUTERS/Henry Nicholls

Synchronised swimmers from Aquabatix train in the pool as swimming pools reopen following easing of the coronavirus disease (COVID-19) restrictions, at Clissold Leisure Centre, in London, Britain April 12, 2021. REUTERS/John Sibley

Guillaume de Seynes, CEO of Hermes, poses during a media presentation at the Watches & Wonders in Geneva, Switzerland, April 6, 2021. Picture taken April 6, 2021. REUTERS/Denis Balibouse

Guillaume de Seynes, CEO of Hermes, poses during a media presentation at the Watches & Wonders in Geneva, Switzerland, April 6, 2021. Picture taken April 6, 2021. REUTERS/Denis Balibouse

Guillaume de Seynes, CEO of Hermes, poses during a media presentation at the Watches & Wonders in Geneva, Switzerland, April 6, 2021. Picture taken April 6, 2021. REUTERS/Denis Balibouse

Guillaume de Seynes, CEO of Hermes, poses during a media presentation at the Watches & Wonders in Geneva, Switzerland, April 6, 2021. Picture taken April 6, 2021. REUTERS/Denis Balibouse

Synchronised swimmers from Aquabatix train in the pool as swimming pools reopen following easing of the coronavirus disease (COVID-19) restrictions, at Clissold Leisure Centre, in London, Britain April 12, 2021. REUTERS/John Sibley

People exercise on running machines as gyms reopen following easing of the coronavirus disease (COVID-19) restrictions, at Clissold Leisure Centre, in London, Britain April 12, 2021. REUTERS/John Sibley

A Swiss flag is pictured on the Mont-Blanc bridge, amid the coronavirus disease (COVID-19) pandemic, in Geneva, Switzerland, March 8, 2021. Picture taken March 8, 2021. REUTERS/Denis Balibouse

A logo of Christian Democratic Union party (CDU) is pictured in Berlin, Germany April 12, 2021. REUTERS/Michele Tantussi

A logo of Christian Democratic Union party (CDU) is pictured in Berlin, Germany April 12, 2021. REUTERS/Michele Tantussi

A logo is pictured outside the World Trade Organization (WTO) building in Geneva, Switzerland, April 1, 2021. Picture taken April 1, 2021. REUTERS/Denis Balibouse

A logo is pictured outside the World Trade Organization (WTO) building in Geneva, Switzerland, April 1, 2021. Picture taken April 1, 2021. REUTERS/Denis Balibouse

A person speaks to a member of staff as gyms reopen following easing of the coronavirus disease (COVID-19) restrictions, in London, Britain April 12, 2021. REUTERS/John Sibley

A logo is pictured outside a building of the United Nations AIDS agency (UNAIDS) in Geneva, Switzerland, April 6, 2021. Picture taken April 6, 2021. REUTERS/Denis Balibouse

A person sanitises weights station as gyms reopen following easing of the coronavirus disease (COVID-19) restrictions, in London, Britain April 12, 2021. REUTERS/John Sibley

People lift weights as gyms reopen following easing of the coronavirus disease (COVID-19) restrictions, in London, Britain April 12, 2021. REUTERS/John Sibley

Seized motorbikes are pictured at the yard of the traffic police in Sanaa, Yemen April 7, 2021. Picture taken April 7, 2021. REUTERS/Khaled Abdullah

A policeman stands in front of seized motorbikes at the yard of the traffic police in Sanaa, Yemen April 7, 2021. Picture taken April 7, 2021. REUTERS/Khaled Abdullah

Motorbike taxi owner, Adnan al-Akhfash, sits with his daughters in Sanaa, Yemen March 30, 2021. Picture taken March 30, 2021. REUTERS/Khaled Abdullah

People ride on a motorbike taxi in Sanaa, Yemen April 7, 2021. Picture taken April 7, 2021. REUTERS/Khaled Abdullah

People ride on a motorbike taxi in Sanaa, Yemen April 7, 2021. Picture taken April 7, 2021. REUTERS/Khaled Abdullah

Motorbike taxi owner, Adnan al-Akhfash, takes a customer, in Sanaa, Yemen March 30, 2021. Picture taken March 30, 2021. REUTERS/Khaled Abdullah

People ride on a motorbike taxi in Sanaa, Yemen April 7, 2021. Picture taken April 7, 2021. REUTERS/Khaled Abdullah

People ride on a motorbike taxi in Sanaa, Yemen April 7, 2021. Picture taken April 7, 2021. REUTERS/Khaled Abdullah

People ride on a motorbike taxi in Sanaa, Yemen April 7, 2021. Picture taken April 7, 2021. REUTERS/Khaled Abdullah

Seized motorbikes are pictured at the yard of the traffic police in Sanaa, Yemen April 7, 2021. Picture taken April 7, 2021. REUTERS/Khaled Abdullah

A man cleans a shop window on Regent street, as the coronavirus disease (COVID-19) restrictions ease, in London, Britain April 12, 2021. REUTERS/Henry Nicholls

A nurse prepares a dose of the AstraZeneca vaccine against the coronavirus disease (COVID-19) during an organised media visit to the vaccination at Taoyuan Hospital in Taoyuan, Taiwan April 12, 2021. REUTERS/Ann Wang

A man walks with his son as they buy a lantern ahead of the holy fasting month of Ramadan, in Sanaa, Yemen, April 10,2021. Picture taken April 10, 2021. REUTERS/Nusaibah Almuaalemi

People shop in a mall ahead of the holy fasting month of Ramadan, in Sanaa, Yemen, April 10, 2021. Picture taken April 10, 2021. REUTERS/Nusaibah Almuaalemi

A boy sells jackets on a street ahead of the holy fasting month of Ramadan, in Sanaa, Yemen, April 10,2021. Picture taken April 10, 2021. REUTERS/Nusaibah Almuaalemi