Girls stand on the rocks consulting a magazine as they carry their trays with fruits for sell, in Dakar, Senegal February 28, 2021. REUTERS/Zohra Bensemra TPX IMAGES OF THE DAY

Girls walk on the rocks as they carry their trays with fruits for sell, in Dakar, Senegal February 28, 2021. REUTERS/Zohra Bensemra

A nurse organize a syringe with a dose of the Pfizer-BioNTech COVID-19 vaccine on a tray during the coronavirus disease (COVID-19) pandemic, at NYC Health + Hospitals Harlem Hospital in the Manhattan borough of New York City, New York, U.S., February 25, 2021. REUTERS/Jeenah Moon

Empty vials of AstraZeneca COVID-19 vaccine are seen in a tray during a mass vaccination campaign at Atletico Madrid's Wanda Metropolitano stadium in Madrid, Spain, February 25, 2021. REUTERS/Sergio Perez

Empty vials of AstraZeneca COVID-19 vaccine are seen in a tray during a mass vaccination campaign at Atletico Madrid's Wanda Metropolitano stadium in Madrid, Spain, February 25, 2021. REUTERS/Sergio Perez

French baker Mickael Reydellet, wearing a protective face mask, looks a tray of freshly-baked baguettes near the oven at "La Parisienne" bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

French baker Mickael Reydellet, wearing a protective face mask, takes out of the oven a tray of baguettes at "La Parisienne" bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

A vial of the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine is seen on a tray, as Japan launches its inoculation campaign, at Tokyo Medical Center in Tokyo, Japan February 17, 2021. Behrouz Mehri/Pool via REUTERS

A vial of the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine is seen on a tray, as Japan launches its inoculation campaign, at Tokyo Medical Center in Tokyo, Japan February 17, 2021. Behrouz Mehri/Pool via REUTERS

Syringes are seen in a tray at a vaccination centre, amid the outbreak of the coronavirus disease (COVID-19), in Antwerp, Belgium February 12, 2021. REUTERS/Johanna Geron

Empty ampules of the Oxford-AstraZeneca's Covishield vaccine are seen on a tray at the Dhaka Medical College vaccination centre in Dhaka, Bangladesh, February 9, 2021. REUTERS

A health worker wearing personal protective equipment (PPE) handles a food tray in Cidade do Futebol, Portugal's soccer squad's training ground hotel facility, now receiving COVID-19 patients amid the coronavirus disease (COVID-19) pandemic in Lisbon, Portugal February 2, 2021. Picture taken February 2, 2021. REUTERS/Pedro Nunes

A worker wearing protective equipment handles food trays for COVID-19 patients in Cidade do Futebol, Portugal's soccer squad's training ground hotel facility, now receiving COVID-19 patients amid the coronavirus disease (COVID-19) pandemic in Lisbon, Portugal February 2, 2021. Picture taken February 2, 2021. REUTERS/Pedro Nunes

Health workers wearing protective gear carry food trays to COVID-19 patients in Cidade do Futebol, Portugal's soccer squad's training ground hotel facility, now receiving COVID-19 patients amid the coronavirus disease (COVID-19) pandemic in Lisbon, Portugal February 2, 2021. Picture taken February 2, 2021. REUTERS/Pedro Nunes

Health workers wearing personal protective gear carry food trays to COVID-19 patients in Cidade do Futebol, Portugal's soccer squad's training ground hotel facility, now receiving COVID-19 patients amid the coronavirus disease (COVID-19) pandemic in Lisbon, Portugal February 2, 2021. Picture taken February 2, 2021. REUTERS/Pedro Nunes

Individually wrapped cheeses from the Cheshire Cheese company are displayed in a tray at Hartington Creamery near Matlock, Britain, January 28, 2021. REUTERS/Phil Noble

Individual Dovedale Blue cheeses are placed onto a tray in the chiller room at Hartington Creamery near Matlock, Britain, January 28, 2021.REUTERS/Phil Noble

A scientist at Bioscientia laboratories prepares a tray with restructured positive coronavirus samples to get them sequenced and analysed for the mutant versions, as the spread of COVID-19 continues, at the Bioscientia headquarters in Ingelheim, Germany, January 27, 2021. REUTERS/Kai Pfaffenbach

A scientist at Bioscientia laboratories prepares a tray with positive coronavirus samples to get them sequenced and analysed for the mutant versions of the coronavirus, as the spread of COVID-19 continues, at the Bioscientia headquarters in Ingelheim, Germany, January 27, 2021, REUTERS/Kai Pfaffenbach

A scientist at Bioscientia laboratories prepares a tray with positive coronavirus samples to get them sequenced and analysed for the mutant strains, as the spread of COVID-19 continues, at the Bioscientia headquarters in Ingelheim, Germany, January 27, 2021. REUTERS/Kai Pfaffenbach

A scientist at Bioscientia laboratories prepares a tray with positive coronavirus samples to get them sequenced and analysed for the mutant strains, as the spread of COVID-19 continues, at the Bioscientia headquarters in Ingelheim, Germany, January 27, 2021. REUTERS/Kai Pfaffenbach

A scientist at Bioscientia laboratories prepares a tray with positive coronavirus samples to get them sequenced and analysed for the mutant strains, as the spread of COVID-19 continues, at the Bioscientia headquarters in Ingelheim, Germany, January 27, 2021. REUTERS/Kai Pfaffenbach

A scientist at Bioscientia laboratories prepares a tray with positive coronavirus samples to get them sequenced and analysed for the mutant strains, as the spread of COVID-19 continues, at the Bioscientia headquarters in Ingelheim, Germany, January 27, 2021. REUTERS/Kai Pfaffenbach

A scientist at Bioscientia laboratories prepares a tray with positive coronavirus samples to get them sequenced and analysed for the mutant strains, as the spread of COVID-19 continues, at the Bioscientia headquarters in Ingelheim, Germany, January 27, 2021. REUTERS/Kai Pfaffenbach

A scientist at Bioscientia laboratories prepares a tray with positive coronavirus samples to get them sequenced and analysed for the mutant strains, as the spread of COVID-19 continues, at the Bioscientia headquarters in Ingelheim, Germany, January 27, 2021, REUTERS/Kai Pfaffenbach

A nurse holds a tray with dead volume syringes filled with the COVID-19 vaccine at a pop-up vaccination site in William Reid Apartments in Brooklyn, New York City, U.S., January 23, 2021. Mary Altaffer/Pool via REUTERS

Employees pick up vials containing CoronaVac, Sinovac's vaccine against the coronavirus disease (COVID-19), as they put them in trays before boxing at Butantan biomedical production center in Sao Paulo, Brazil January 22, 2021. REUTERS/Amanda Perobelli

Employees pick up vials containing CoronaVac, Sinovac's vaccine against the coronavirus disease (COVID-19), as they placed in trays before boxing at Butantan biomedical production center in Sao Paulo, Brazil January 22, 2021. REUTERS/Amanda Perobelli

A tray with syringes containing the Pfizer/BioNTech vaccine against the coronavirus disease (COVID-19) are pictured on the opening day of a vaccination center at the Congress Center in Darmstadt, Germany January 19, 2021. Frank Rumpenhorst/Pool via REUTERS

A tray with syringes containing the Pfizer/BioNTech vaccine against the coronavirus disease (COVID-19) are pictured on the opening day of a vaccination center at the Congress Center in Darmstadt, Germany January 19, 2021. Frank Rumpenhorst/Pool via REUTERS

A medical worker holds a tray with a syringe containing the Pfizer/BioNTech vaccine against the coronavirus disease (COVID-19) on the opening day of a vaccination center at the Messe Berlin trade fair grounds in Berlin, Germany January 18, 2021. Sean Gallup/Pool via REUTERS

Syringes with doses of the Pfizer-BioNTech COVID-19 vaccine lie in a tray at the Bavarian Red Cross vaccination center, in Pfaffenhofen an der Ilm, Germany January 10, 2021. REUTERS/Andreas Gebert

A tray of vials containing the Pfizer-BioNTech Covid-19 vaccine is seen at the EHPAD (care home and day centre for elderly people) operated by DomusVi in Asnieres-sur-Seine, as the spread of the coronavirus disease (COVID-19) continues in France, January 8, 2021. REUTERS/Benoit Tessier

Food parcels for families that received free school meal vouchers during previous lockdowns rest on a tray before being delivered, amid a new lockdown imposed due to the outbreak of the coronavirus disease (COVID-19), at Holne Chase Primary School in Milton Keynes, Britain, January 6, 2021. REUTERS/Andrew Boyers

A medical worker holds a tray with a vial of the vaccination against the coronavirus disease (COVID-19) as Israel continues its national vaccination drive, during a third national COVID lockdown, in Ashdod, Israel January 4, 2021. Picture taken January 4, 2021. REUTERS/Amir Cohen

A healthcare worker carries a tray of prepared doses of Pfizer-BioNTech COVID-19 vaccine at the Del-Pest Central Hospital as the coronavirus disease (COVID-19) outbreak continues, in Budapest, Hungary, December 26, 2020. Szilard Koszticsak/Pool via REUTERS

William Senior (L), Pharmacy Technician at BMC, unpacks two trays comprising the first shipment of Pfizer's coronavirus disease (COVID-19) vaccine delivered to Boston Medical Center as Victor Mendoza, Certified Pharmacy Technician at BMC, gets ready to open the storage freezer, at Boston Medical Center in Boston, Massachusetts, U.S. December 14, 2020. Jessica Rinaldi/POOL via REUTERS

William Senior (L), Pharmacy Technician at BMC, unpacks two trays comprising the first shipment of Pfizer's coronavirus disease (COVID-19) vaccine delivered to Boston Medical Center in Boston, Massachusetts, U.S. December 14, 2020. Jessica Rinaldi/POOL via REUTERS

William Senior (L), Pharmacy Technician at BMC, unpacks two trays comprising the first shipment of Pfizer's coronavirus disease (COVID-19) vaccine delivered to Boston Medical Center as Victor Mendoza, Certified Pharmacy Technician at BMC, gets ready to open the storage freezer, at Boston Medical Center in Boston, Massachusetts, U.S. December 14, 2020. Jessica Rinaldi/POOL via REUTERS

William Senior (L), Pharmacy Technician at BMC, unpacks two trays comprising the first shipment of Pfizer's coronavirus disease (COVID-19) vaccine delivered to Boston Medical Center in Boston, Massachusetts, U.S. December 14, 2020. Jessica Rinaldi/POOL via REUTERS

Stollen (Christmas cakes) lie on trays at the bakery of Sebastian Bruecklmaier, which reportedly counts Britain's Queen among their clients, in Munich, Germany, December 14, 2020. REUTERS/Andreas Gebert

A waiter holds a tray with Nestle plant based sausages of the Harvest Gourmet line during the launch event in Beijing, China, December 9, 2020. REUTERS/Thomas Peter

A man wearing a protective mask walks with a tray as he sells tea outside shops as the outbreak of the coronavirus disease (COVID-19) continues, in Karachi, Pakistan December 8, 2020. REUTERS/Akhtar Soomro

Food is displayed on a tray at a bakery at night amid the coronavirus disease (COVID-19) crisis, in Jerusalem's Old City November 25, 2020. Picture taken November 25, 2020. REUTERS/Ammar Awad

A tray of rapid coronavirus tests which produce a result in thirty minutes is seen at The Chiswick Nursing Centre, following the outbreak of the coronavirus disease (COVID-19) in London, Britain, November 26, 2020. REUTERS/Kevin Coombs

A meal tray sits outside a room housing a patient with coronavirus disease (COVID-19) at UW Health University Hospital in Madison, Wisconsin, U.S. November 18, 2020. REUTERS/Daniel Acker

A customer carries a tray with food in the Yaoji Chaogan traditional Beijing cuisine restaurant, which then-Vice President Joe Biden visited in 2011, in Beijing, China, November 9, 2020. REUTERS/Thomas Peter

An employee of the Fulton County Board of Registration and Elections disinfects plastic trays while processing ballots in Atlanta, Georgia, U.S., November 4, 2020. Picture taken November 4, 2020. REUTERS/Brandon Bell

An employee of the Fulton County Board of Registration and Elections disinfects plastic trays while processing ballots in Atlanta, Georgia U.S., November 4, 2020. REUTERS/Brandon Bell

A worker of the Miami-Dade County Elections Department pulls a cart with U.S. Postal Service trays with mail-in ballots during the 2020 U.S. presidential election in Miami, Florida, U.S., November 3, 2020. REUTERS/Marco Bello

U.S. Postal Service trays with mail-in ballots are seen during the 2020 U.S. presidential election in Miami, Florida, U.S., November 3, 2020. REUTERS/Marco Bello

A worker of the Miami-Dade County Elections Department carries U.S. Postal Service trays with mail-in ballots in them during the 2020 U.S. presidential election in Miami, Florida, U.S., November 3, 2020. REUTERS/Marco Bello

U.S. Postal Service trays are seen as workers of the Miami-Dade County Elections Department feed mail-in ballots in counting machines during the 2020 U.S. presidential election in Miami, Florida, U.S., November 3, 2020. REUTERS/Marco Bello

Worker of the Miami-Dade County Elections Department accomodate U.S. Postal Service trays with mail-in ballots in them during the 2020 U.S. presidential election in Miami, Florida, U.S., November 3, 2020. REUTERS/Marco Bello

An Egyptian Bedouin restaurant worker carries a tray in the old area of Shali in Siwa Oasis in Egypt's Western Desert, during the activation of domestic tourism after the government cancelled the celebration of the Siyaha peace festival, or the 'Peace festival', amid concerns over the coronavirus disease (COVID-19) pandemic, in Siwa Oasis, west of the Egyptian capital, Egypt October 16, 2020. Picture taken October 16, 2020. REUTERS/Amr Abdallah Dalsh TPX IMAGES OF THE DAY

An employee brings over a tray of empty drinkware after last orders at The Bridewell pub, amid the outbreak of the coronavirus disease (COVID-19), in Liverpool, Britain October 13, 2020. REUTERS/Molly Darlington

A waiter wearing a face shield and a protective mask carries a tray as he serves customers at a restaurant, as the Indonesian capital kicks off a two-week "transitional" period of eased restrictions, after the pace of coronavirus disease (COVID-19) infections slowed over the last two weeks, in Jakarta, Indonesia, October 12, 2020. REUTERS/Ajeng Dinar Ulfiana

A waiter wearing a protective mask and face shield carries food on trays at a restaurant after it reopened amidst the spread of the coronavirus disease (COVID-19), in Mumbai, India, October, 5, 2020. REUTERS/Francis Mascarenhas

A waiter carrying a tray wears a face mask, as local authorities in the Italian capital Rome order face coverings to be worn at all times out of doors in an effort to counter rising coronavirus disease (COVID-19) infections, in Rome, Italy October 2, 2020. REUTERS/Guglielmo Mangiapane

A woman scouts to set a wooden tray of cassava paste, also known as tapioca, on the ground close to a gas flaring furnace in Ughelli, Delta State, Nigeria September 17, 2020. Picture taken September 17, 2020. REUTERS/Afolabi Sotunde