Housekeeping staff members prepare beds in a temporary quarantine facility for the incoming passengers inside a closed terminal building, at the Netaji Subhas Chandra Bose International Airport (CCU), after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in Kolkata, India, May 27, 2020. REUTERS/Rupak De Chowdhuri

Housekeeping staff members prepare beds in a temporary quarantine facility for the incoming passengers inside a closed terminal building, at the Netaji Subhas Chandra Bose International Airport (CCU), after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in Kolkata, India, May 27, 2020. REUTERS/Rupak De Chowdhuri

The offices of Alphabet's Sidewalk Labs "smart city" are seen after the company announced it has pulled out of its project due to economic uncertainty in Toronto, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

The offices of Alphabet's Sidewalk Labs "smart city" lie vacant due to coronavirus disease (COVID-19), after the company announced it has pulled out of its project due to economic uncertainty in Toronto, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

Building models are seen at the offices of Alphabet's Sidewalk Labs "smart city" after the company announced it has pulled out of its project due to economic uncertainty in Toronto, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

Building models are seen at the offices of Alphabet's Sidewalk Labs "smart city" after the company announced it has pulled out of its project due to economic uncertainty in Toronto, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

The proposed site of Alphabet's Sidewalk Labs "smart city" is seen after the company announced it has pulled out of its project due to economic uncertainty in Toronto, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

The proposed site of Alphabet's Sidewalk Labs "smart city"is seen after the company announced it has pulled out of its project due to economic uncertainty in Toronto, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

The proposed site of Alphabet's Sidewalk Labs "smart city" is seen after the company announced it has pulled out of its project due to economic uncertainty in Toronto, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

A truck leaves an Eastern Waterfront work site after Alphabet's Sidewalk Labs announced it pulled out of the neighbouring "smart city" project due to economic uncertainty in Toronto, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

A welder works on an Eastern Waterfront site after Alphabet's Sidewalk Labs announced it pulled out of the neighbouring "smart city" project due to economic uncertainty in Toronto, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

Construction equipment is parked on an Eastern Waterfront work site after Alphabet's Sidewalk Labs announced it pulled out of the neighbouring "smart city" project due to economic uncertainty in Toronto, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

Workers pass construction equipment on an Eastern Waterfront work site after Alphabet's Sidewalk Labs announced it pulled out of the neighbouring "smart city" project due to economic uncertainty in Toronto, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

Construction equipment is parked on an Eastern Waterfront work site after Alphabet's Sidewalk Labs announced it pulled out of the neighbouring "smart city" project due to economic uncertainty in Toronto, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

The proposed site of Alphabet's Sidewalk Labs "smart city" is seen after the company announced it has pulled out of its project due to economic uncertainty in Toronto, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

A school bus is parked at the proposed site of Alphabet's Sidewalk Labs "smart city", after the company announced it has pulled out of its project due to economic uncertainty in Toronto, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

A man passes the offices of the proposed site of Alphabet's Sidewalk Labs "smart city", after the company announced it has pulled out of its project due to economic uncertainty in Toronto, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

Signs calling for a rent strike hang from an apartment balcony during the coronavirus disease (COVID-19) restrictions in Toronto, Ontario, Canada April 18, 2020. REUTERS/Chris Helgren

Signs calling for a rent strike hang from an apartment balcony during the coronavirus disease (COVID-19) restrictions in Toronto, Ontario, Canada April 18, 2020. REUTERS/Chris Helgren

A woman passes signs calling for a rent strike during the coronavirus disease (COVID-19) restrictions in Toronto, Ontario, Canada April 18, 2020. REUTERS/Chris Helgren

Mobile homes are seen at the Bella-B Mobile Home Park, where owner Yacov Sinai decreased rents by $225, or about 27%, to help residents in difficult economic situations due to the coronavirus disease (COVID-19) outbreak, in Seattle, Washington, U.S. April 6, 2020. REUTERS/David Ryder

John Walker casts a shadow over his cat Sheldon at the Bella-B Mobile Home Park, where owner Yacov Sinai decreased rents by $225, or about 27%, to help residents in difficult economic situations due to the coronavirus disease (COVID-19) outbreak, in Seattle, Washington, U.S. April 6, 2020. REUTERS/David Ryder TPX IMAGES OF THE DAY

Delia Ramirez, a restaurant worker, hangs aprons to dry at her home in the Bella-B Mobile Home Park, where owner Yacov Sinai decreased rents by $225, or about 27%, to help residents in difficult economic situations due to the coronavirus disease (COVID-19) outbreak, in Seattle, Washington, U.S. April 6, 2020. REUTERS/David Ryder

Linda Cortes and her mother Angelica Cortes plant vegetable seeds outside their home at the Bella-B Mobile Home Park, where owner Yacov Sinai decreased rents by $225, or about 27%, to help residents in difficult economic situations due to the coronavirus disease (COVID-19) outbreak, in Seattle, Washington, U.S. April 6, 2020. REUTERS/David Ryder

Layla Adornetto and Elizabeth Adornetto blow seeds from dandelions at the Bella-B Mobile Home Park, where owner Yacov Sinai decreased rents by $225, or about 27%, to help residents in difficult economic situations due to the coronavirus disease (COVID-19) outbreak, in Seattle, Washington, U.S. April 6, 2020. REUTERS/David Ryder TPX IMAGES OF THE DAY

John Walker poses for a portrait in front of his home at the Bella-B Mobile Home Park, where owner Yacov Sinai decreased rents by $225, or about 27%, to help residents in difficult economic situations due to the coronavirus disease (COVID-19) outbreak, in Seattle, Washington, U.S. April 6, 2020. REUTERS/David Ryder

Mario Gomez, a resident who also does maintenance, poses for a portrait at the Bella-B Mobile Home Park, where owner Yacov Sinai decreased rents by $225, or about 27%, to help residents in difficult economic situations due to the coronavirus disease (COVID-19) outbreak, in Seattle, Washington, U.S. April 6, 2020. REUTERS/David Ryder

Linda Cortes and her mother Angelica Cortes plant vegetable seeds outside their home at the Bella-B Mobile Home Park, where owner Yacov Sinai decreased rents by $225, or about 27%, to help residents in difficult economic situations due to the coronavirus disease (COVID-19) outbreak, in Seattle, Washington, U.S. April 6, 2020. REUTERS/David Ryder

Elizabeth Adornetto and Layla Adornetto play at the Bella-B Mobile Home Park, where owner Yacov Sinai decreased rents by $225, or about 27%, to help residents in difficult economic situations due to the coronavirus disease (COVID-19) outbreak, in Seattle, Washington, U.S. April 6, 2020. REUTERS/David Ryder

France's President Emmanuel Macron meets staff during a visit to an EHPAD (Housing Establishment for Dependant Elderly People) in the 13th arrondissement of Paris, France amid fear of coronavirus disease (COVID-19) March 6, 2020. Ludovic Marin/Pool via REUTERS

France's President Emmanuel Macron listens to staff during a visit to an EHPAD (Housing Establishment for Dependant Elderly People) in the 13th arrondissement of Paris, France amid fear of coronavirus disease (COVID-19) March 6, 2020. Ludovic Marin/Pool via REUTERS

Israeli Prime Minister Benjamin Netanyahu delivers a statement overlooking the Israeli settlement of Har Homa, located in an area of the Israeli-occupied West Bank, that Israel annexed to Jerusalem after the region's capture in the 1967 Middle East war, February 20, 2020. Debbie Hill/Pool via REUTERS

Israeli Prime Minister Benjamin Netanyahu delivers a statement overlooking the Israeli settlement of Har Homa, located in an area of the Israeli-occupied West Bank, that Israel annexed to Jerusalem after the region's capture in the 1967 Middle East war, February 20, 2020. Debbie Hill/Pool via REUTERS

Israeli Prime Minister Benjamin Netanyahu delivers a statement overlooking the Israeli settlement of Har Homa, located in an area of the Israeli-occupied West Bank, that Israel annexed to Jerusalem after the region's capture in the 1967 Middle East war, February 20, 2020. Debbie Hill/Pool via REUTERS

Israeli Prime Minister Benjamin Netanyahu points to the area of Israeli settlement of Har Homa, located in an area of the Israeli-occupied West Bank, that Israel annexed to Jerusalem after the region's capture in the 1967 Middle East war, February 20, 2020. Debbie Hill/Pool via REUTERS

Israeli Prime Minister Benjamin Netanyahu delivers a statement overlooking the Israeli settlement of Har Homa, located in an area of the Israeli-occupied West Bank, that Israel annexed to Jerusalem after the region's capture in the 1967 Middle East war, February 20, 2020. Debbie Hill/Pool via REUTERS

Israeli Prime Minister Benjamin Netanyahu stands at an overview of the Israeli settlement of Har Homa, located in an area of the Israeli-occupied West Bank, that Israel annexed to Jerusalem after the region's capture in the 1967 Middle East war, February 20, 2020. Debbie Hill/Pool via REUTERS

Israeli Prime Minister Benjamin Netanyahu delivers statement overlooking Israeli settlement of Har Homa, located in an area of the Israeli-occupied West Bank, that Israel annexed to Jerusalem after the region's capture in the 1967 Middle East war, February 20, 2020. Debbie Hill/Pool via REUTERS

Israeli Prime Minister Benjamin Netanyahu stands at an overview of the Israeli settlement of Har Homa, located in an area of the Israeli-occupied West Bank, that Israel annexed to Jerusalem after the region's capture in the 1967 Middle East war, February 20, 2020. Debbie Hill/Pool via REUTERS

Israeli Prime Minister Benjamin Netanyahu delivers a statement overlooking the Israeli settlement of Har Homa, located in an area of the Israeli-occupied West Bank, that Israel annexed to Jerusalem after the region's capture in the 1967 Middle East war, February 20, 2020. Debbie Hill/Pool via REUTERS

A propaganda banner is hung on a barrier outside a residential compound, following an outbreak of the novel coronavirus in the country, in Beijing, China February 11, 2020. The Chinese characters on the banner read, "Strengthen confidence, work together". Picture taken February 11, 2020. REUTERS/Tingshu Wang

A man wearing a face mask walks past a banner hung outside a residential block following an outbreak of the novel coronavirus in the country, in Beijing, China February 10, 2020. The Chinese characters on the banner read, "Cover your mouth and nose while sneezing, be cautious about rubbing your eyes afterwards". Picture taken February 10, 2020. REUTERS/Tingshu Wang

Personnel in protective gear prepare to evacuate residents from a public housing building following the outbreak of the novel coronavirus, in Hong Kong, China February 11, 2020. REUTERS/Tyrone Siu

The Fairmont Empress Hotel, which was opened by the hotel division of the Canadian Pacific Railway in 1908, is seen in Victoria, British Columbia, Canada January 21, 2020. Picture taken January 21, 2020. REUTERS/Kevin Light

The Fairmont Empress Hotel, which was opened by the hotel division of the Canadian Pacific Railway in 1908, is seen on the shore of the city's Inner Harbour in Victoria, British Columbia, Canada January 21, 2020. Picture taken January 21, 2020. REUTERS/Kevin Light

The Fairmont Empress Hotel, which was opened by the hotel division of the Canadian Pacific Railway in 1908, is seen in Victoria, British Columbia, Canada January 21, 2020. Picture taken January 21, 2020. REUTERS/Kevin Light

Tourists walk in front of the Fairmont Empress Hotel, which was opened by the hotel division of the Canadian Pacific Railway in 1908, in Victoria, British Columbia, Canada January 21, 2020. Picture taken January 21, 2020. REUTERS/Kevin Light

Britain's Minister of State for Housing Esther McVey smiles as Northern Powerhouse Minister Jake Berry gestures on their way to a cabinet meeting on Downing Street in London, Britain January 7, 2020. REUTERS/Toby Melville

Britain's Minister of State for Housing Esther McVey and Northern Powerhouse Minister Jake Berry walk to a cabinet meeting on Downing Street in London, Britain January 7, 2020. REUTERS/Toby Melville

Abandoned buildings stand near the Hong Kong-Shenzhen border, in Shenzhen, China, October 22, 2019. REUTERS/Tyrone Siu SEARCH "HONG KONG-SHENZHEN BORDER" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

People walk past newly built residential flats near the Hong Kong-Shenzhen border in Shenzhen, China October 26, 2019. REUTERS/Tyrone Siu SEARCH "HONG KONG-SHENZHEN BORDER" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

People cross the road outside the State Theatre Building that is slated for demolition in the North Point neighbourhood in Hong Kong, China, December 11, 2019. REUTERS/Thomas Peter SEARCH "NORTH POINT" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY

A woman stands at the balcony of her house which will be demolished to build new apartments in downtown Shanghai, China, December 1, 2010. Picture taken December 1, 2010. REUTERS/Carlos Barria/File Photo SEARCH "POY DECADE" FOR THIS STORY. SEARCH "REUTERS POY" FOR ALL BEST OF 2019 PACKAGES. TPX IMAGES OF THE DAY.

A view of a slum is seen along a seashore in Mumbai, India, November 28, 2019. Picture taken November 28, 2019. REUTERS/Prashant Waydande

The U.S. Capitol building is seen in a reflection on Capitol Hill in Washington, U.S., November 27, 2019. REUTERS/Loren Elliott

A police vehicle is seen outside Kylin Villa in Shenzhen, Guangdong province, China November 21, 2019. Picture taken November 21, 2019. REUTERS/David Kirton

A car leaves Bauhinia Villa in a leafy Shenzhen suburb in Guangdong province, China November 21, 2019. Picture taken November 21, 2019. REUTERS/David Kirton

The Eiger, Guggi and Giesen Glaciers are pictured near the Jungfrau in the Swiss Alps in Wengen, Switzerland August 27, 2019. Picture taken August 27, 2019. REUTERS/Denis Balibouse

The U.S. Capitol building is pictured at sunset on Capitol Hill in Washington, U.S., November 22, 2019. REUTERS/Loren Elliott

Britian's Prime Minister Boris Johnson prepares to lay a brick during a visit to the Barratt Homes - Willow Grove housing development in Bedford, Britian November 21, 2019. Dan Kitwood/Pool via REUTERS