A healthcare worker prepares a dose of China's SINOVAC vaccine against the coronavirus disease (COVID-19) during the first stage of the vaccination plan, which aims to inoculate teachers, military personnel, firefighters and police officers, among other non medical essential workers, at a vaccination center in Antel Arena, Montevideo, Uruguay March 1, 2021. REUTERS/Mariana Greif

A medical worker prepares to test passengers as they arrive at Nice Cote d'Azur Airport amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 1, 2021. REUTERS/Eric Gaillard

A medical worker prepares to test passengers as they arrive at Nice Cote d'Azur Airport amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 1, 2021. REUTERS/Eric Gaillard

A medical worker prepares to test passengers as they arrive at Nice Cote d'Azur Airport amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 1, 2021. REUTERS/Eric Gaillard

Medical workers prepare to test passengers as they arrive at Nice Cote d'Azur Airport amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 1, 2021. REUTERS/Eric Gaillard

A medical worker prepares to test passengers as they arrive at Nice Cote d'Azur Airport amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 1, 2021. REUTERS/Eric Gaillard

Foodstuff aid is prepared by the local charity Mona Relief to be haded out to beneficiaries at a camp for internally displaced people on the outskirts of Sanaa, Yemen March 1, 2021. REUTERS/Khaled Abdullah

A healthcare worker prepares a dose of China's SINOVAC vaccine against the coronavirus disease (COVID-19) during the first stage of the vaccination plan, which aims to inoculate teachers, military personnel, firefighters and police officers, among other non medical essential workers, at a vaccination center in Antel Arena, Montevideo, Uruguay March 1, 2021. REUTERS/Mariana Greif

Eszter Harmath prepares a cake at home during the coronavirus disease (COVID-19) pandemic, in Szentendre, Hungary, February 26, 2021. Picture taken February 26, 2021. REUTERS/Bernadett Szabo

Eszter Harmath prepares dough before baking a cake at her home, during the coronavirus disease (COVID-19) pandemic, in Szentendre, Hungary, February 26, 2021. Picture taken February 26, 2021. REUTERS/Bernadett Szabo

Eszter Harmath prepares to bake a cake at her home during the coronavirus disease (COVID-19) pandemic, in Szentendre, Hungary, February 26, 2021. Picture taken February 26, 2021. REUTERS/Bernadett Szabo

Eszter Harmath prepares pastries at her home during the coronavirus disease (COVID-19) pandemic, in Szentendre, Hungary, February 26, 2021. Picture taken February 26, 2021. REUTERS/Bernadett Szabo

Eszter Harmath holds her son Gellert, as she prepares pastries at her home during the coronavirus disease (COVID-19) pandemic, in Szentendre, Hungary, February 26, 2021. Picture taken February 26, 2021. REUTERS/Bernadett Szabo

A health worker prepares to adminster a vaccination against the coronavirus disease (COVID-19) during a vaccination campaign in Abidjan, Ivory Coast March 1, 2021. REUTERS/Luc Gnago

Fiona Scott prepares to visit her mother Mary Cook at a nursing home for the first time since the lockdown started in Scotland, amid the spread of coronavirus disease (COVID-19) in Edinburgh, Scotland, Britain March 1, 2021. REUTERS/Russel Cheyne/Pool

Fiona Scott prepares to visit her mother Mary Cook at a nursing home for the first time since the lockdown started in Scotland, amid the spread of coronavirus disease (COVID-19) in Edinburgh, Scotland, Britain March 1, 2021. REUTERS/Russel Cheyne/Pool

A health worker prepares a dose of the coronavirus disease (COVID-19) vaccine in Bergamo, Italy, March 1, 2021. REUTERS/Flavio Lo Scalzo

A health worker prepares a dose of the coronavirus disease (COVID-19) vaccine for a woman in Bergamo, Italy, March 1, 2021. REUTERS/Flavio Lo Scalzo

Mona Muhammad prepares food at her house in Sanaa, Yemen February 27, 2021. Picture taken February 27, 2021. REUTERS/Nusaibah Almuaalemi

A military medical professional prepares a syringe with the Sinovac Biotech's CoronaVac vaccine for the coronavirus disease (COVID-19) during the launch of the vaccination drive, at the Victoriano Luna Medical Center, in Quezon City, Metro Manila, Philippines, March 1, 2021. REUTERS/Lisa Marie David

A military medical professional prepares a syringe with Sinovac Biotech's CoronaVac vaccine for the coronavirus disease (COVID-19) during the launch of the vaccination drive, at the Victoriano Luna Medical Center, in Quezon City, Metro Manila, Philippines, March 1, 2021. REUTERS/Lisa Marie David

Health care worker prepares a dose of China's Sinovac Biotech vaccine for the coronavirus disease (COVID-19), during a mass vaccination program for vendors and workers at a shopping mall in Tangerang, on the outskirts of Jakarta, Indonesia, March 1, 2021. REUTERS/Ajeng Dinar Ulfiana

Naval officers stand on a U.S navy vessel as it prepares to dock in the eastern city of Port Sudan, Sudan March 1, 2021. REUTERS/El Tayeb Siddiq

A U.S navy vessel carrying naval officers is seen at sea as it prepares to dock in the eastern city of Port Sudan, Sudan March 1, 2021. REUTERS/El Tayeb Siddiq

A U.S navy vessel carrying naval officers is seen at sea as it prepares to dock in the eastern city of Port Sudan, Sudan March 1, 2021. REUTERS/El Tayeb Siddiq

A medical worker prepares a dose of a vaccine for the coronavirus disease (COVID-19), during a vaccination program at Kuala Lumpur Hospital in Kuala Lumpur, Malaysia March 1, 2021. REUTERS/Lim Huey Teng

A health worker prepares to inject Sinovac Biotech's Coronavac on the first day of the coronavirus disease (COVID-19) inoculation drive in the Philippines, at the Lung Center of the Philippines, Quezon City, Metro Manila, March 1, 2021. REUTERS/Eloisa Lopez

A vendor selling seafood prepares fish as she serves her customers, amid the spread of the coronavirus disease (COVID-19) outbreak, at a traditional market in Jakarta, Indonesia, March 1, 2021. REUTERS/Willy Kurniawan

Vendors selling seafood prepare their goods while waiting for customers at a traditional market, amid the spread of the coronavirus disease (COVID-19) outbreak, in Jakarta, Indonesia, March 1, 2021. REUTERS/Willy Kurniawan

An election worker prepares a polling station during the municipal and parliamentary elections in San Salvador, El Salvador, February 28, 2021. REUTERS/Jose Cabezas

Nordic Skiing - FIS Nordic World Ski Championships - Oberstdorf, Germany - February 28, 2021 General view of the track preparation team before the men's team nordic combined gundersen 4 x 5km REUTERS/Kai Pfaffenbach

A skateboarder gestures as he prepares to compete at the Red Bull Mind the Gap first skateboarding event in Egypt, inside Townhouse Gallery near Tahrir Square, amid the coronavirus disease (COVID-19) pandemic in Cairo, Egypt February 27, 2021. Picture taken February 27, 2021. REUTERS/Amr Abdallah Dalsh

A medical worker prepares a dose of AstraZeneca's vaccine against the coronavirus disease (COVID-19) at a hospital in Kabul, Afghanistan February 28, 2021. REUTERS/Mohammad Ismail

A health worker prepares to administer the Sinovac coronavirus disease (COVID-19) vaccine at the Samut Sakhon hospital in Samut Sakhon province, Thailand, February 28, 2021. REUTERS/Athit Perawongmetha

A health worker prepares to administer the Sinovac coronavirus disease (COVID-19) vaccine at the Samut Sakhon hospital in Samut Sakhon province, Thailand, February 28, 2021. REUTERS/Athit Perawongmetha

An electoral worker carries a stack of chairs while preparing a polling station on a street ahead of the municipal and parliamentary elections in San Salvador, El Salvador, February 27, 2021. REUTERS/Jose Cabezas

Electoral workers handle boxes containing empty ballot forms to be used by voters at a polling station in a school ahead of the municipal and parliamentary elections in San Salvador, El Salvador, February 27, 2021. REUTERS/Jose Cabezas

Electoral workers install an electrical power network at a polling station on a street ahead of the municipal and parliamentary elections in San Salvador, El Salvador, February 27, 2021. REUTERS/Jose Cabezas

Electoral workers handle boxes containing empty ballot forms to be used by voters at a polling station in a school ahead of the municipal and parliamentary elections in San Salvador, El Salvador, February 27, 2021. REUTERS/Jose Cabezas

Electoral workers unload boxes containing empty ballot forms to be used by voters at a polling station in a school ahead of the municipal and parliamentary elections in San Salvador, El Salvador, February 27, 2021. REUTERS/Jose Cabezas

Electoral workers unload boxes containing empty ballot forms to be used by voters at a polling station in a school ahead of the municipal and parliamentary elections in San Salvador, El Salvador, February 27, 2021. REUTERS/Jose Cabezas

Electoral workers wait to unload boxes containing empty ballot forms to be used by voters at a polling station in a school ahead of the municipal and parliamentary elections in San Salvador, El Salvador, February 27, 2021. REUTERS/Jose Cabezas

Electoral workers prepare polling stations on a street ahead of the municipal and parliamentary elections in San Salvador, El Salvador, February 27, 2021. REUTERS/ Jose Cabezas

Boxes containing empty ballot forms to be used by voters are seen at a polling station inside a school ahead of the municipal and parliamentary elections in San Salvador, El Salvador, February 27, 2021. REUTERS/Jose Cabezas

Volunteers prepare before the arrival of seniors from the immigrant community to receive coronavirus disease (COVID-19) vaccinations, during an event organised by the Mexican consulate and local health officials, in Atlanta, Georgia, U.S., February 27, 2021. REUTERS/Amira Karaoud

The Mexican consulate prepares for a coronavirus disease (COVID-19) vaccination event for seniors from the immigrant community in Atlanta, Georgia, U.S., February 26, 2021. Picture taken February 26, 2021. REUTERS/Amira Karaoud

Sheila Dubose, 62, rolls up her sleeve as she prepares to receive her coronavirus disease (COVID-19) vaccination at Second Ebenezer Church in Detroit, Michigan, U.S., February 27, 2021. REUTERS/Emily Elconin

Nordic Skiing - FIS Nordic World Ski Championships - Oberstdorf, Germany - February 27, 2021 Athletes prepare in the ski area before the men's skiathlon 15/15km C/F REUTERS/Kai Pfaffenbach

A worker prints Vatican flags ahead of Pope Francis's planned visit, in Najaf, Iraq February 27, 2021. REUTERS/Alaa Al-Marjani

A worker prints Vatican flags ahead of Pope Francis planned visit, in Najaf, Iraq February 27, 2021. REUTERS/Alaa Al-Marjani

Pro-democracy protesters prepare their protective gears during a rally against the military coup in Yangon, Myanmar, February 27, 2021. REUTERS/Stringer

A Cathay Pacific cargo plane carrying Fosun-BioNTech COVID-19 vaccines prepares to dock at Hong Kong International Airport, in Hong Kong, China February 27, 2021. Jerome Favre/Pool via REUTERS REFILE - CLARIFYING NAMING STYLE OF VACCINE

Nurses prepare for the first dose of the Pfizer BioNTech vaccine Covid-19 at the National Medical Center vaccination center in Seoul, South Korea February 27, 2021. Song Kyung-Seok/Pool via REUTERS

ATTENTION EDITORS - CAPTION CORRECTION FOR RC2YZL9RGSO9, RC2YZL9WG41N, RC2YZL9B2HH7, RC2YZL9VHGX2, RC2YZL96NQ7H, RC2YZL9BWC78, RC2YZL9QO1MG, RC2YZL9JWTW5, RC2YZL9CIBOW. WE ARE SORRY FOR ANY INCONVENIENCE CAUSED. REUTERS. REFILE - CORRECTING ORGANISATION SPELLING. Gabriela Pereyra, Paula Soto, ad Gonzalo Lopez Lluch, members of the cultural organisation Comando Maradona, prepare a mosaic as a homage to late Argentine soccer superstar Diego Armado Maradona, at their workshop, in Buenos Aires, Argentina February 24, 2021. Picture taken February 24, 2021. REUTERS/Agustin Marcarian TEMPLATE OUT

A healthcare worker prepares a dose of Sinovac's CoronaVac coronavirus disease (COVID-19) vaccine at a drive-thru vaccination centre in Santiago, Chile, February 26, 2021. REUTERS/Ivan Alvarado

A woman prepares to receive a dose of Sinovac's CoronaVac coronavirus disease (COVID-19) vaccine at a drive-thru vaccination center in Santiago, Chile, February 26, 2021. REUTERS/Ivan Alvarado

A healthcare worker prepares to administer a dose of Sinovac's CoronaVac coronavirus disease (COVID-19) vaccine at a drive-thru vaccination center in Santiago, Chile, February 26, 2021. REUTERS/Ivan Alvarado

Participants prepare firecrackers during the 'Beehive Firecrackers' festival at the Yanshui district in Tainan, Taiwan February 26, 2021. Picture taken on February 26, 2021. REUTERS/Ann Wang

A health worker prepares to apply the second dose of Sinovac's CoronaVac coronavirus disease (COVID-19) vaccine to an elderly citizen at Solar das Acacias nursing home, in Guarulho near Sao Paulo, Brazil February 26, 2021. REUTERS/Carla Carniel

Former Scottish National Party leader and former First Minister of Scotland, Alex Salmond prepares to give his opening statement to The Committee on the Scottish Government Handling of Harassment Complaints at Holyrood, examining the government's handling of harassment allegations against him, in Edinburgh, Scotland, Britain February 26, 2021. Andy Buchanan/Pool via REUTERS