A health worker applies a Sinovac's CoronaVac coronavirus disease (COVID-19) vaccine to a person at the Museum of the Republic at Catete Palace in Rio de Janeiro, Brazil February 25, 2021. REUTERS/Ricardo Moraes

A banner with an image of the Egyptian President Abdel Fattah el-Sisi is seen as a person buys vegetables at a market amid the coronavirus disease (COVID-19) pandemic in Cairo, Egypt February 25, 2021. REUTERS/Mohamed Abd El Ghany

Rachel Levine, nominated to be an assistant secretary at the Department of Health and Human Services, testifies during a Senate Health, Education, Labor, and Pensions Committee hearing with few senators participating in person on Capitol Hill in Washington, U.S., February 24, 2021. REUTERS/Tom Brenner/Pool

A person gestures from a window at the Renaissance London Heathrow Hotel at Heathrow Airport, as Britain introduces a hotel quarantine programme for arrivals from a "red list" of 30 countries due to the coronavirus disease (COVID-19) pandemic, in London, Britain, February 25, 2021. REUTERS/Henry Nicholls

Personal trainer Bjoern Leber is seen during an interview with Reuters at the AlbGym fitness studio in St. Blasien, Germany February 9, 2021. Picture taken February 9, 2021. REUTERS/Arnd Wiegmann

Personal trainer Bjoern Leber is seen during an interview with Reuters at the AlbGym fitness studio in St. Blasien, Germany February 9, 2021. Picture taken February 9, 2021. REUTERS/Arnd Wiegmann

Personal trainer Bjoern Leber is seen during an interview with Reuters at the AlbGym fitness studio in St. Blasien, Germany February 9, 2021. Picture taken February 9, 2021. REUTERS/Arnd Wiegmann

A person walks on Roker beach during sunrise, Sunderland, Britain, February 25, 2021. REUTERS/Lee Smith

A person walks on Roker beach during sunrise, Sunderland, Britain, February 25, 2021. REUTERS/Lee Smith

A person walks on Roker beach during sunrise, Sunderland, Britain, February 25, 2021. REUTERS/Lee Smith

A person walks on Roker beach during sunrise, Sunderland, Britain, February 25, 2021. REUTERS/Lee Smith

A person enters Santa Maria degli Angeli church for the funeral of the Italian ambassador Luca Attanasio and his bodyguard Vittorio Iacovacci, who were killed in an attack in the Democratic Republic of Congo, in Rome, Italy, February 25, 2021. REUTERS/Yara Nardi

A person looks out of a window at a quarantine hotel, as part of Canada's new measures against the coronavirus disease (COVID-19), which require a short stay at a government approved hotel near Toronto Pearson International Airport in Mississauga, Ontario, Canada February 24, 2021. REUTERS/Carlos Osorio

A health worker prepares a person to get a dose of the Sputnik V coronavirus disease (COVID-19) vaccine during a mass vaccination in Mexico City, Mexico February 24, 2021. REUTERS/Carlos Jasso

A person passes a syringe to another person during a mass vaccination against the coronavirus disease (COVID-19) in Mexico City, Mexico February 24, 2021. REUTERS/Carlos Jasso

A health worker shows a vial of the Sputnik V coronavirus disease (COVID-19) vaccine to a person during a mass vaccination in Mexico City, Mexico February 24, 2021. REUTERS/Carlos Jasso

A person receives a dose of the Sputnik V coronavirus disease (COVID-19) vaccine during a mass vaccination in Mexico City, Mexico February 24, 2021. REUTERS/Carlos Jasso

A person receives a dose of the Sputnik V coronavirus disease (COVID-19) vaccine during a mass vaccination in Mexico City, Mexico February 24, 2021. REUTERS/Carlos Jasso

A person receives a dose of the Sputnik V coronavirus disease (COVID-19) vaccine during a mass vaccination in Mexico City, Mexico February 24, 2021. REUTERS/Carlos Jasso

A person receives a dose of the Sputnik V coronavirus disease (COVID-19) vaccine during a mass vaccination in Mexico City, Mexico February 24, 2021. REUTERS/Carlos Jasso

A person receives a dose of the Sputnik V coronavirus disease (COVID-19) vaccine during a mass vaccination in Mexico City, Mexico February 24, 2021. REUTERS/Carlos Jasso

A person receives a dose of Sputnik V (Gam-COVID-Vac) vaccine against the coronavirus disease (COVID-19) at a vaccination centre in a shopping mall in Saint Petersburg, Russia February 24, 2021. REUTERS/Anton Vaganov

A person stands as fans arrive at Madison Square Garden to attend a Knicks game amid the coronavirus disease (COVID-19) pandemic in the Manhattan borough of New York City, New York, U.S., February 23, 2021. Picture taken February 23, 2021. REUTERS/Joy Malone

A social distancing marker is seen inside a temporary isolation room ahead of in-person learning, amid the coronavirus disease (COVID-19) pandemic, at the Jefferson-Houston School in Alexandria, Virginia, U.S., February 23, 2021. REUTERS/Tom Brenner

A social distancing marker is displayed along a hallway ahead of in-person learning, amid the coronavirus disease (COVID-19) pandemic, at the Jefferson-Houston School in Alexandria, Virginia, U.S., February 23, 2021. REUTERS/Tom Brenner

Classroom seats are stacked near windows ahead of in-person learning amid the coronavirus disease (COVID-19) pandemic, at the Jefferson-Houston School in Alexandria, Virginia, U.S., February 23, 2021. REUTERS/Tom Brenner

An empty tack board hangs inside a temporary isolation room ahead of in-person learning, amid the coronavirus disease (COVID-19) pandemic, at the Jefferson-Houston School in Alexandria, Virginia, U.S., February 23, 2021. REUTERS/Tom Brenner TPX IMAGES OF THE DAY

A custodian operates a floor waxing machine along a hallway in preparation of in-person learning, amid the coronavirus disease (COVID-19) pandemic, at the Jefferson-Houston School in Alexandria, Virginia, U.S., February 23, 2021. REUTERS/Tom Brenner

Protective plexiglass stands on a teacher's desk ahead of in-person learning, amid the coronavirus disease (COVID-19) pandemic, at the Jefferson-Houston School in Alexandria, Virginia, U.S., February 23, 2021. REUTERS/Tom Brenner

Pencils rest on a desk divided by plexiglass ahead of in-person learning, amid the coronavirus disease (COVID-19) pandemic, at the Jefferson-Houston School in Alexandria, Virginia, U.S., February 23, 2021. REUTERS/Tom Brenner

A person exits Penn Station as a screen displays "welcome back fans" outside Madison Square Garden before a Knicks game amid the coronavirus disease (COVID-19) pandemic in the Manhattan borough of New York City, New York, U.S., February 23, 2021. REUTERS/Eduardo Munoz

Classroom shelving is stacked with supplies ahead of in-person learning, amid the coronavirus disease (COVID-19) pandemic, at the Jefferson-Houston School in Alexandria, Virginia, U.S., February 23, 2021. REUTERS/Tom Brenner

Students' desks are arranged apart for social distancing inside a classroom ahead of in-person learning, amid the coronavirus disease (COVID-19) pandemic, at the Jefferson-Houston School in Alexandria, Virginia, U.S., February 23, 2021. REUTERS/Tom Brenner

A person walks holding a portrait of Ahmaud Arbery, an unarmed young Black man shot and killed after being chased by a white former law enforcement officer and his son, after a candle light vigil to mark the one year anniversary of his death, at New Springfield Baptist Church in Waynesboro, Georgia, U.S. February 23, 2021. REUTERS/Dustin Chambers

A person holds a candle during a candle light vigil to mark the one year anniversary of the death of Ahmaud Arbery, an unarmed young Black man shot and killed after being chased by a white former law enforcement officer and his son, at New Springfield Baptist Church in Waynesboro, Georgia, U.S. February 23, 2021. REUTERS/Dustin Chambers

An Indigenous person holds a cellphone as members of indigenous communities and supporters of Ecuador's presidential candidate Yaku Perez gather outside the Electoral National Council (CNE) in Quito, Ecuador February 23, 2021. REUTERS/Santiago Arcos

An Indigenous person wearing a face mask is pictured as members of indigenous communities and supporters of Ecuador's presidential candidate Yaku Perez gather outside the Electoral National Council (CNE) in Quito, Ecuador February 23, 2021. REUTERS/Santiago Arcos

A person looks at a charity shop as she walks a dog, amid the outbreak of the coronavirus disease (COVID-19), in Buckingham, Britain, February 23, 2021. REUTERS/Andrew Boyers

An employee wearing personal protective equipment (PPE) pushes a ballot box on a trolley during a demonstration for the media revealing preparations ahead of Israel's upcoming election amid the coronavirus disease (COVID-19) crisis, at the Central Elections Committee's logistics centre in Shoham, Israel February 23, 2021. REUTERS/Ammar Awad

An employee wearing personal protective equipment (PPE) pushes a portable voting booth to a car window during a demonstration for the media revealing preparations ahead of Israel's upcoming election amid the coronavirus disease (COVID-19) crisis, at the Central Elections Committee's logistics centre in Shoham, Israel February 23, 2021. REUTERS/Ammar Awad

A person receives a dose of the coronavirus disease (COVID-19) vaccine in Dakar, Senegal February 23, 2021. REUTERS/ Zohra Bensemra

An employee wearing personal protective equipment (PPE) shows an envelope as he stands behind a booth during a demonstration for the media revealing preparations ahead of Israel's upcoming election amid the coronavirus disease (COVID-19) crisis, at the Central Elections Committee's logistics centre in Shoham, Israel February 23, 2021. REUTERS/Ammar Awad

An employee wearing personal protective equipment (PPE) stands behind a booth during a demonstration for the media revealing preparations ahead of Israel's upcoming election amid the coronavirus disease (COVID-19) crisis, at the Central Elections Committee's logistics centre in Shoham, Israel February 23, 2021. REUTERS/Ammar Awad

An employee wearing personal protective equipment (PPE) stands behind a booth during a demonstration for the media revealing preparations ahead of Israel's upcoming election amid the coronavirus disease (COVID-19) crisis, at the Central Elections Committee's logistics centre in Shoham, Israel February 23, 2021. REUTERS/Ammar Awad

A person receives a dose of the Sinovac Biotech's COVID-19 vaccine at a community vaccination center in Hong Kong, China, February 23, 2021. Paul Yeung/Pool via REUTERS

A person receives a dose of the Sinovac Biotech's COVID-19 vaccine at a community vaccination center in Hong Kong, China, February 23, 2021. Paul Yeung/Pool via REUTERS

A healthcare worker in personal protective equipment (PPE) collects a swab sample from a resident during a testing campaign for the coronavirus disease (COVID-19), in Mumbai, India, February 23, 2021. REUTERS/Francis Mascarenhas

A healthcare worker in personal protective equipment (PPE) collects a swab sample from a resident during a testing campaign for the coronavirus disease (COVID-19), in Mumbai, India, February 23, 2021. REUTERS/Francis Mascarenhas

A person prays for the absolution of a Catholic priest accused of sexually abusing a minor, outside the courts in Ciudad Juarez, Mexico February 22, 2021. REUTERS/Jose Luis Gonzalez

A person prays for the absolution of a Catholic priest accused of sexually abusing a minor, outside the courts in Ciudad Juarez, Mexico February 22, 2021. REUTERS/Jose Luis Gonzalez

A person receives the Sinovac coronavirus disease (COVID-19) vaccine during a mass vaccination in Ecatepec, state of Mexico, Mexico February 22, 2021. REUTERS/Carlos Jasso TPX IMAGES OF THE DAY

A person receives the Sinovac coronavirus disease (COVID-19) vaccine during a mass vaccination in Ecatepec, state of Mexico, Mexico February 22, 2021. REUTERS/Carlos Jasso REFILE - CORRECTING TYPO IN WORD "STATE\

A healthcare worker administers a dose of the Sinovac coronavirus disease (COVID-19) vaccine to an elderly person, during a mass vaccination in Ecatepec, state of Mexico, Mexico February 22, 2021. REUTERS/Carlos Jasso REFILE - CORRECTING TYPO IN WORD "STATE\

An actor portraying Tobias Lear, personal secretary to first U.S. President George Washington, stands holding an umbrella at Washington's Mount Vernon Estate on the anniversary of his birthday, in Mount Vernon, Virginia, U.S., February 22, 2021. REUTERS/Tom Brenner

An actor portraying Tobias Lear, personal secretary to first U.S. President George Washington, stands holding an umbrella at Washington's Mount Vernon Estate on the anniversary of his birthday, in Mount Vernon, Virginia, U.S., February 22, 2021. REUTERS/Tom Brenner

A person stands with a rubbish container in front of police vehicles in the middle of the street, as supporters of arrested Catalan rapper Pablo Hasel protest in Barcelona, Spain, February 22, 2021. REUTERS/Nacho Doce

A person uses a megaphone as members of indigenous communities and supporters of Ecuador's presidential candidate Yaku Perez march to the capital Quito, in Latacunga, Ecuador February 22, 2021. REUTERS/Santiago Arcos

A person adjusts a shoe as members of indigenous communities and supporters of Ecuador's presidential candidate Yaku Perez march to the capital Quito, in Latacunga, Ecuador February 22, 2021. REUTERS/Santiago Arcos

A person reacts while embracing Ecuador's presidential candidate Yaku Perez as members of indigenous communities and his supporters march to the capital Quito, in Salcedo, Ecuador February 22, 2021. REUTERS/Santiago Arcos

A person gives a traditional Salcedo ice-cream to a police officer as members of indigenous communities and supporters of Ecuador's presidential candidate Yaku Perez march to the capital Quito, in Salcedo, Ecuador February 22, 2021. REUTERS/Santiago Arcos