Christmas decorations are displayed on a rooftop terrace in Wilmersdorf district, amid the coronavirus disease (COVID-19) outbreak in Berlin, Germany, December 1, 2020. REUTERS/Fabrizio Bensch

Christmas illuminations are pictured at Tauentzienstrasse shopping boulevard, amid the coronavirus disease (COVID-19) outbreak in Berlin, Germany, December 1, 2020. REUTERS/Fabrizio Bensch

Christmas illuminations are pictured at Tauentzienstrasse shopping boulevard, amid the coronavirus disease (COVID-19) outbreak in Berlin, Germany, December 1, 2020. REUTERS/Fabrizio Bensch

Christmas illuminations are pictured at Tauentzienstrasse shopping boulevard, amid the coronavirus disease (COVID-19) outbreak in Berlin, Germany, December 1, 2020. REUTERS/Fabrizio Bensch

An illuminated Christmas tree is pictured at Breitscheidplatz square, amid the coronavirus disease (COVID-19) outbreak in Berlin, Germany, December 1, 2020. REUTERS/Fabrizio Bensch

An illuminated Christmas tree is pictured at Breitscheidplatz square, amid the coronavirus disease (COVID-19) outbreak in Berlin, Germany, December 1, 2020. Picture taken with a fish-eye lens. REUTERS/Fabrizio Bensch

An illuminated Christmas tree is pictured at the main train station Hauptbahnhof, amid the coronavirus disease (COVID-19) outbreak in Berlin, Germany, December 1, 2020. REUTERS/Fabrizio Bensch

Christmas decoration is pictured at Tauentzienstrasse shopping boulevard, amid the coronavirus disease (COVID-19) outbreak in Berlin, Germany, December 1, 2020. REUTERS/Fabrizio Bensch

A bus drives past a Debenhams department store at Clapham Junction, in London, Britain, December 1, 2020. REUTERS/Dylan Martinez

A bus drives past a Debenhams department store at Clapham Junction, in London, Britain, December 1, 2020. REUTERS/Dylan Martinez

A person rides a bike past a Debenhams department store at Clapham Junction, in London, Britain, December 1, 2020. REUTERS/Dylan Martinez

People go shopping after Lombardy was downgraded from a red to an orange zone, loosening coronavirus disease (COVID-19) restrictions including allowing non-essential shops to re-open ahead of Christmas, in Milan, Italy, December 1, 2020. REUTERS/Flavio Lo Scalzo

Christmas decorations are on display as people go shopping after Lombardy was downgraded from a red to an orange zone, loosening coronavirus disease (COVID-19) restrictions including allowing non-essential shops to re-open ahead of Christmas, in Milan, Italy, December 1, 2020. REUTERS/Flavio Lo Scalzo

U.S. Senator Bill Cassidy (R-LA) holds Mardi Gras beads and necklaces as bipartisan members of the Senate and House gather to announce a framework for fresh coronavirus disease (COVID-19) relief legislation at a news conference on Capitol Hill in Washington, U.S., December 1, 2020. REUTERS/Kevin Lamarque

U.S. Senator Joe Manchin (D-WVA) removes his mask to speak as bipartisan members of the Senate and House gather to announce a framework for fresh coronavirus disease (COVID-19) relief legislation at a news conference on Capitol Hill in Washington, U.S., December 1, 2020. REUTERS/Kevin Lamarque

U.S. Senators' Lisa Murkowski (R-AK), Jeane Shaheen (D-NH) and Mitt Romney (R-UT) listen as Bill Cassidy (R-LA) speaks during a news conference of bipartisan members of the Senate and House to announce a framework for fresh coronavirus disease (COVID-19) relief legislation on Capitol Hill in Washington, U.S., December 1, 2020. REUTERS/Kevin Lamarque

People go shopping after Lombardy was downgraded from a red to an orange zone, loosening coronavirus disease (COVID-19) restrictions including allowing non-essential shops to re-open ahead of Christmas, in Milan, Italy, December 1, 2020. REUTERS/Flavio Lo Scalzo

People go shopping after Lombardy was downgraded from a red to an orange zone, loosening coronavirus disease (COVID-19) restrictions including allowing non-essential shops to re-open ahead of Christmas, in Milan, Italy, December 1, 2020. REUTERS/Flavio Lo Scalzo

People go shopping after Lombardy was downgraded from a red to to an orange zone, loosening coronavirus disease (COVID-19) restrictions including allowing non-essential shops to re-open ahead of Christmas, in Milan, Italy, December 1, 2020. REUTERS/Flavio Lo Scalzo

People go shopping after Lombardy was downgraded from a red to to an orange zone, loosening coronavirus disease (COVID-19) restrictions including allowing non-essential shops to re-open ahead of Christmas, in Milan, Italy, December 1, 2020. REUTERS/Flavio Lo Scalzo

U.S. Senator Joe Manchin (D-WVA) removes his mask to speak as bipartisan members of the Senate and House gather to announce a framework for fresh coronavirus disease (COVID-19) relief legislation at a news conference on Capitol Hill in Washington, U.S., December 1, 2020. REUTERS/Kevin Lamarque

A display is seen as bipartisan members of the Senate and House gather to announce a framework for fresh coronavirus disease (COVID-19) relief legislation at a news conference on Capitol Hill in Washington, U.S., December 1, 2020. REUTERS/Kevin Lamarque

U.S. Senator Bill Cassidy (R-LA) holds Mardi Gras beads and necklaces as bipartisan members of the Senate and House gather to announce a framework for fresh coronavirus disease (COVID-19) relief legislation at a news conference on Capitol Hill in Washington, U.S., December 1, 2020. REUTERS/Kevin Lamarque

U.S. Senator Angus King (I-ME) stands with a chart as bipartisan members of the Senate and House gather to announce a framework for fresh coronavirus disease (COVID-19) relief legislation at a news conference on Capitol Hill in Washington, U.S., December 1, 2020. REUTERS/Kevin Lamarque

U.S. Senator Angus King (I-ME) holds a chart as bipartisan members of the Senate and House gather to announce a framework for fresh coronavirus disease (COVID-19) relief legislation at a news conference on Capitol Hill in Washington, U.S., December 1, 2020. REUTERS/Kevin Lamarque

Union nurses with the New York State Nurses Association (NYSNA) walk the picket line after walking out on strike outside Montefiore New Rochelle Hospital in New Rochelle, New York, U.S., December 1, 2020. REUTERS/Mike Segar

Union nurses with the New York State Nurses Association (NYSNA) walk the picket line after walking out on strike outside Montefiore New Rochelle Hospital in New Rochelle, New York, U.S., December 1, 2020. REUTERS/Mike Segar

U.S. Senator Mitt Romney (R-UT) speaks as bipartisan members of the Senate and House gather to announce a framework for fresh coronavirus disease (COVID-19) relief legislation at a news conference on Capitol Hill in Washington, U.S., December 1, 2020. REUTERS/Kevin Lamarque

Union nurses with the New York State Nurses Association (NYSNA) walk the picket line after walking out on strike outside Montefiore New Rochelle Hospital in New Rochelle, New York, U.S., December 1, 2020. REUTERS/Mike Segar

A nurse looks out a hospital room window as union nurses with the New York State Nurses Association (NYSNA) walk the picket line below after walking out on strike at Montefiore New Rochelle Hospital in New Rochelle, New York, U.S., December 1, 2020. REUTERS/Mike Segar

U.S. Senator Mitt Romney (R-UT) removes his mask to speak as bipartisan members of the Senate and House gather to announce a framework for fresh coronavirus disease (COVID-19) relief legislation at a news conference on Capitol Hill in Washington, U.S., December 1, 2020. REUTERS/Kevin Lamarque

Union nurses with the New York State Nurses Association (NYSNA) walk the picket line after walking out on strike outside Montefiore New Rochelle Hospital in New Rochelle, New York, U.S., December 1, 2020. REUTERS/Mike Segar

A nurse and a patient look out a hospital room window as union nurses with the New York State Nurses Association (NYSNA) walk the picket line below after walking out on strike at Montefiore New Rochelle Hospital in New Rochelle, New York, U.S., December 1, 2020. REUTERS/Mike Segar

Bangladesh: les dernières données sur l'épidémie de COVID-19

Union nurses with the New York State Nurses Association (NYSNA) walk the picket line after walking out on strike outside Montefiore New Rochelle Hospital in New Rochelle, New York, U.S., December 1, 2020. REUTERS/Mike Segar

Union nurses with the New York State Nurses Association (NYSNA) walk the picket line after walking out on strike outside Montefiore New Rochelle Hospital in New Rochelle, New York, U.S., December 1, 2020. REUTERS/Mike Segar

U.S. Senator Mitt Romney (R-UT) removes his mask to speak as bipartisan members of the Senate and House gather to announce a framework for fresh coronavirus disease (COVID-19) relief legislation at a news conference on Capitol Hill in Washington, U.S., December 1, 2020. REUTERS/Kevin Lamarque

Bangladesh: les dernières données sur l'épidémie de COVID-19

Chili: les dernières données sur l'épidémie de COVID-19

Chili: les dernières données sur l'épidémie de COVID-19

Union nurses with the New York State Nurses Association (NYSNA) walk the picket line after walking out on strike outside Montefiore New Rochelle Hospital in New Rochelle, New York, U.S., December 1, 2020. REUTERS/Mike Segar

Union nurses with the New York State Nurses Association (NYSNA) walk the picket line after walking out on strike outside Montefiore New Rochelle Hospital in New Rochelle, New York, U.S., December 1, 2020. REUTERS/Mike Segar

Union nurses with the New York State Nurses Association (NYSNA) walk the picket line after walking out on strike outside Montefiore New Rochelle Hospital in New Rochelle, New York, U.S., December 1, 2020. REUTERS/Mike Segar

Students at Holne Chase School interact with a class member via the internet as his family is self-isolating amid the Coronavirus disease (Covid-19) in Milton Keynes, Britain, December 1, 2020. REUTERS/Andrew Boyers

Students at Holne Chase School interact with a class member via the internet as his family is self-isolating amid the Coronavirus disease (Covid-19) in Milton Keynes, Britain, December 1, 2020. REUTERS/Andrew Boyers

Iran: les dernières données sur l'épidémie de COVID-19

Iran: les dernières données sur l'épidémie de COVID-19

Students at Holne Chase School interact with a class member via the internet as his family is self-isolating amid the Coronavirus disease (Covid-19) in Milton Keynes, Britain, December 1, 2020. REUTERS/Andrew Boyers

Pérou: les dernières données sur l'épidémie de COVID-19

Pérou: les dernières données sur l'épidémie de COVID-19

U.S. Senators' Mark Warner (D-VA) and Joe Manchin (D-WVA) speak as bipartisan members of the Senate and House gather to announce a framework for fresh coronavirus disease (COVID-19) relief legislation at a news conference on Capitol Hill in Washington, U.S., December 1, 2020. REUTERS/Kevin Lamarque

Malaisie: les dernières données sur l'épidémie de COVID-19

Malaisie: les dernières données sur l'épidémie de COVID-19

Philippines: les dernières données sur l'épidémie de COVID-19

Philippines: les dernières données sur l'épidémie de COVID-19

Singapour: les dernières données sur l'épidémie de COVID-19

Singapour: les dernières données sur l'épidémie de COVID-19

Cool boxes are pictured before being transported to an airplane as Brussels International Airport and its partners prepare a massive logistic operation of carrying new vaccines and vaccine candidates for the coronavirus disease (COVID-19) through Brussels International Airport, in Brussels, Belgium, December 1, 2020. REUTERS/Johanna Geron

Cool boxes are pictured before being transported to an airplane as Brussels International Airport and its partners prepare a massive logistic operation of carrying new vaccines and vaccine candidates for the coronavirus disease (COVID-19) through Brussels International Airport, in Brussels, Belgium, December 1, 2020. REUTERS/Johanna Geron

A worker prepares cool boxes to be transported by an airplane as Brussels International Airport and its partners prepare a massive logistic operation of carrying new vaccines and vaccine candidates for the coronavirus disease (COVID-19) through Brussels International Airport, in Brussels, Belgium, December 1, 2020. REUTERS/Johanna Geron