A family of Polish tourists watches as a waiter prepares to close a coffee shop due to the closing restrictions in an effort to control the spread of the coronavirus disease (COVID-19) as they tour the city of Ronda, southern Spain February 25, 2021. REUTERS/Jon Nazca

Canada's Conservative Party leader Erin O'Toole speaks during Question Period, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in the House of Commons on Parliament Hill in Ottawa, Ontario, Canada February 24, 2021. REUTERS/Blair Gable

Canada's Conservative Party leader Erin O'Toole gestures as he speaks during Question Period, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in the House of Commons on Parliament Hill in Ottawa, Ontario, Canada February 24, 2021. REUTERS/Blair Gable

Canada's Bloc Quebecois leader Yves-Francois Blanchet gestures as he speaks during Question Period, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in the House of Commons on Parliament Hill in Ottawa, Ontario, Canada February 24, 2021. REUTERS/Blair Gable

Canada's New Democratic Party leader Jagmeet Singh gestures as he speaks during Question Period, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in the House of Commons on Parliament Hill in Ottawa, Ontario, Canada February 24, 2021. REUTERS/Blair Gable

Canada's Prime Minister Justin Trudeau speaks during Question Period, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in the House of Commons on Parliament Hill in Ottawa, Ontario, Canada February 24, 2021. REUTERS/Blair Gable

Canada's Prime Minister Justin Trudeau speaks during Question Period, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in the House of Commons on Parliament Hill in Ottawa, Ontario, Canada February 24, 2021. REUTERS/Blair Gable

Canada's Prime Minister Justin Trudeau gestures as he speaks during Question Period, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in the House of Commons on Parliament Hill in Ottawa, Ontario, Canada February 24, 2021. REUTERS/Blair Gable

Canada's Prime Minister Justin Trudeau speaks during Question Period, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in the House of Commons on Parliament Hill in Ottawa, Ontario, Canada February 24, 2021. REUTERS/Blair Gable

Canada's Prime Minister Justin Trudeau speaks during Question Period, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in the House of Commons on Parliament Hill in Ottawa, Ontario, Canada February 24, 2021. REUTERS/Blair Gable

U.S. President Joe Biden, with domestic policy advisor Susan Rice, meets with a group of Black essential workers to thank them for their efforts throughout the coronavirus pandemic during an online discussion in the South Court Auditorium at the White House in Washington, U.S. February 23, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden appears on video screens as he meets with a group of Black essential workers to thank them for their efforts throughout the coronavirus pandemic during an online discussion in the South Court Auditorium at the White House in Washington, U.S. February 23, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden meets with a group of Black essential workers to thank them for their efforts throughout the coronavirus pandemic during an online discussion in the South Court Auditorium at the White House in Washington, U.S. February 23, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden meets with a group of Black essential workers to thank them for their efforts throughout the coronavirus pandemic during an online discussion in the South Court Auditorium at the White House in Washington, U.S. February 23, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden meets with a group of black essential workers to thank them for their efforts throughout the coronavirus pandemic during an online discussion in the South Court Auditorium at the White House in Washington, U.S., February 23, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden is seen with St. Louis, Missouri firefighter emergency medical technician Demetris “Al” Alfred and Columbus, Ohio childcare worker Carmen Palmer as he meets with a group of black essential workers to thank them for their efforts throughout the coronavirus pandemic during an online discussion in the South Court Auditorium at the White House in Washington, U.S., February 23, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden meets with a group of black essential workers to thank them for their efforts throughout the coronavirus pandemic during an online discussion in the South Court Auditorium at the White House in Washington, U.S., February 23, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden speaks with a group of black essential workers to thank them for their efforts throughout the coronavirus pandemic during an online discussion in the South Court Auditorium at the White House in Washington, U.S., February 23, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden meets with St. Louis, Missouri firefighter emergency medical technician Demetris “Al” Alfred; Chicago, Illinois pharmacist Melanie Owens; child care worker Carmen Palmer, from Columbus, Ohio; and Cedar Rapids, Iowa grocery store manager Jeff Carter during an online discussion with a group of black essential workers to thank them for their efforts throughout the coronavirus pandemic, in the South Court Auditorium at the White House in Washington, U.S., February 23, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden meets with a group of black essential workers to thank them for their efforts throughout the coronavirus pandemic during an online discussion in the South Court Auditorium at the White House in Washington, U.S., February 23, 2021. REUTERS/Jonathan Ernst

A meeting room outfitted with airtight glass panels is pictured at short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A view of a meeting room outfitted with airtight glass panels at short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A hand sanitiser dispenser is pictured at the lobby of short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A staff member shows how food is delivered to rooms at the short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A staff member shows how food is delivered in a compartment outside a room of the short-stay facility Connect@Changi, which will welcome business "bubble" travellers from March as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A staff member shows how documents could be sanitised and exchanged in a special window of a meeting room at short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A worker paints a corridor of a short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

Workers make final touch-ups to the rooms at the short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

An access gate leads to a courtyard of the short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A view of a courtyard of the short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A view of pavilions and a gym in the courtyard of the short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A view of pod-like rest areas in the pavilion of the short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

Grass-like LED lamps light up the courtyard of the short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A staff member shows how face-to-face meetings can be conducted in a meeting room outfitted with airtight glass panels at short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A receptionist wearing a face shield sits in the lobby of short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A view of a room at the short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

Receptionists wear face shields at the business centre of the short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A meeting room outfitted with air-tight glass panels to reduce the risk of transmission, is pictured at the short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A view of a meeting room outfitted with airtight glass panels at short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A view of a waiting area at the testing station of short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A view of a waiting area at the testing station of short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A view of the short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A receptionist wearing a face shield sits in the lobby of the short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

A view of the lobby of the short-stay facility Connect@Changi, a complex of hotel rooms and meeting halls near the airport which will welcome business "bubble" travellers from March, as part of the city-state's effort to resume international meetings and conferences amid the coronavirus disease (COVID-19) outbreak, in Singapore February 22, 2021. REUTERS/Edgar Su

Canada's Prime Minister Justin Trudeau takes part in a news conference, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in Ottawa, Ontario, Canada February 19, 2021. REUTERS/Blair Gable

Canada's Prime Minister Justin Trudeau takes part in a news conference, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in Ottawa, Ontario, Canada February 19, 2021. REUTERS/Blair Gable

Canada's Prime Minister Justin Trudeau takes part in a news conference, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in Ottawa, Ontario, Canada February 19, 2021. REUTERS/Blair Gable

Canada's Prime Minister Justin Trudeau takes part in a news conference, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in Ottawa, Ontario, Canada February 19, 2021. REUTERS/Blair Gable

Canada's Prime Minister Justin Trudeau takes part in a news conference, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in Ottawa, Ontario, Canada February 19, 2021. REUTERS/Blair Gable

Canada's Prime Minister Justin Trudeau walks to a news conference, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in Ottawa, Ontario, Canada February 19, 2021. REUTERS/Blair Gable

Canada's Prime Minister Justin Trudeau walks to a news conference, as efforts continue to help slow the spread of the coronavirus disease (COVID-19), in Ottawa, Ontario, Canada February 19, 2021. REUTERS/Blair Gable

Workers for recovery efforts are seen next to a sign board reading suspension of the train service after a strong quake at Iwaki station in Iwaki, Fukushima prefecture, Japan February 14, 2021. REUTERS/Issei Kato

An electoral poster of former Catalan separatist leader Carles Puigdemont for Junts per Catalunya party is seen on the empty Rambla de Catalunya street ahead of the February 14 regional election, during a night-time curfew set as part of a state of emergency in an effort to control the outbreak of the coronavirus disease (COVID-19), in Barcelona, Spain February 10, 2021. Picture taken February 10, 2021. REUTERS/Nacho Doce

An electoral poster of Salvador Illa, leader of Catalonia from the Socialist Party of Catalonia (PSC), is seen on the empty Gran Via street ahead of the February 14 regional election, during a night-time curfew set as part of a state of emergency in an effort to control the outbreak of the coronavirus disease (COVID-19), in Barcelona, Spain February 11, 2021. REUTERS/Nacho Doce

An electoral poster of Catalan separatist leader Oriol Junqueras for the Catalan Left Republican party (ERC) is seen on empty Diagonal avenue ahead of the February 14 regional election, during a night-time curfew set as part of a state of emergency in an effort to control the outbreak of the coronavirus disease (COVID-19), in Barcelona, Spain February 10, 2021. Picture taken February 10, 2021. REUTERS/Nacho Doce

A hospital staff member treats a patient suffering from the coronavirus disease (COVID-19), in the Intensive Care Unit (ICU) at the Hospital Clinic, after Catalonia's government imposed new restrictions in an effort to control a COVID-19 third wave, in Barcelona Spain February 3, 2021. Picture taken February 3, 2021. REUTERS/Nacho Doce

A hospital staff member treats a patient suffering from the coronavirus disease (COVID-19), in the Intensive Care Unit (ICU) at the Hospital Clinic, after Catalonia's government imposed new restrictions in an effort to control a COVID-19 third wave, in Barcelona Spain February 3, 2021. Picture taken February 3, 2021. REUTERS/Nacho Doce

Hospital staff members treat a patient suffering from the coronavirus disease (COVID-19), in the Intensive Care Unit (ICU) at the Hospital Clinic, after Catalonia's government imposed new restrictions in an effort to control a COVID-19 third wave, in Barcelona Spain February 3, 2021. Picture taken February 3, 2021. REUTERS/Nacho Doce

Hospital staff members treat a patient suffering from the coronavirus disease (COVID-19), in the Intensive Care Unit (ICU) at the Hospital Clinic, after Catalonia's government imposed new restrictions in an effort to control a COVID-19 third wave, in Barcelona Spain February 3, 2021. Picture taken February 3, 2021. REUTERS/Nacho Doce

Hospital staff members carry a patient suffering from the coronavirus disease (COVID-19), in the Intensive Care Unit (ICU) at the Hospital Clinic, after Catalonia's government imposed new restrictions in an effort to control a COVID-19 third wave, in Barcelona Spain February 3, 2021. Picture taken February 3, 2021. REUTERS/Nacho Doce