Kajima employee Gunasekar Udayakumar uses the Nervotec app to scan his face and check his vital signs as part of a daily checkup for employees at a construction site in central Singapore, February 19, 2021. Picture taken February 19, 2021. REUTERS/Joseph Campbell

Kajima employee Gunasekar Udayakumar uses the Nervotec app to scan his face and check his vital signs as part of a daily checkup for employees at a construction site in central Singapore, February 19, 2021. Picture taken February 19, 2021. REUTERS/Joseph Campbell

Air Force One crew members scan the tarmac following a previous day ice storm, ahead of U.S. President Joe Biden's trip to Michigan, at Joint Base Andrews in Maryland, U.S., February 19, 2021. Picture taken through a bus window. REUTERS/Tom Brenner TPX IMAGES OF THE DAY

Consumers scan QR codes for the "LeaveHomeSafe" COVID-19 contact-tracing app at a restaurant, following the coronavirus disease (COVID-19) outbreak, in Hong Kong, China February 18, 2021. REUTERS/Tyrone Siu

A member of a bomb disposal squad from Gujarat Police walks with a sniffer dog to scan the field at Sardar Patel Gujarat Stadium, where India and England are scheduled to play their third test match in Ahmedabad, India, February 17, 2021. REUTERS/Amit Dave

One-Betta, a sniffer dog trained to detect the coronavirus disease (COVID-19), sits next to her handler after scanning a classroom at the Florida International University, in Miami, Florida, U.S., February 11, 2021. REUTERS/Marco Bello

One-Betta, a sniffer dog trained to detect the coronavirus disease (COVID-19), scans books in a library at the Florida International University, in Miami, Florida, U.S., February 11, 2021. REUTERS/Marco Bello

One-Betta, a sniffer dog trained to detect the coronavirus disease (COVID-19), scans a classroom at the Florida International University, in Miami, Florida, U.S., February 11, 2021. REUTERS/Marco Bello

One-Betta, a sniffer dog trained to detect the coronavirus disease (COVID-19), scans a classroom at the Florida International University, in Miami, Florida, U.S., February 11, 2021. REUTERS/Marco Bello

One-Betta, a sniffer dog trained to detect the coronavirus disease (COVID-19), scans a library at the Florida International University, in Miami, Florida, U.S., February 11, 2021. REUTERS/Marco Bello

One-Betta, a sniffer dog trained to detect the coronavirus disease (COVID-19), scans a library at the Florida International University, in Miami, Florida, U.S., February 11, 2021. REUTERS/Marco Bello

One-Betta, a sniffer dog trained to detect the coronavirus disease (COVID-19), scans books in a library at the Florida International University, in Miami, Florida, U.S., February 11, 2021. REUTERS/Marco Bello

One-Betta, a sniffer dog trained to detect the coronavirus disease (COVID-19), scans a library at the Florida International University, in Miami, Florida, U.S., February 11, 2021. REUTERS/Marco Bello

One-Betta, a sniffer dog trained to detect the coronavirus disease (COVID-19), is petted by her handler after scanning a classroom at the Florida International University, in Miami, Florida, U.S., February 11, 2021. REUTERS/Marco Bello

One-Betta, a sniffer dog trained to detect the coronavirus disease (COVID-19), scans a classroom at the Florida International University, in Miami, Florida, U.S., February 11, 2021. REUTERS/Marco Bello

A physiotherapist scans the face of Palestinian boy Ahmed Al-Deeb, who has severe facial burns, to provide him with a 3D transparent face mask, at Medecins Sans Frontieres (MSF)'s clinic in Gaza City February 8, 2021. Picture taken February 8, 2021. REUTERS/Mohammed Salem

A physiotherapist scans the face of Palestinian boy Ahmed Al-Deeb, who has severe facial burns, to provide him with a 3D transparent face mask, at Medecins Sans Frontieres (MSF)'s clinic in Gaza City February 8, 2021. Picture taken February 8, 2021. REUTERS/Mohammed Salem

An information sign realted to sniffer dogs trained to detect the coronavirus disease (COVID-19) is seen at an entrance to the American Airlines Arena before a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

An information sign realted to sniffer dogs trained to detect the coronavirus disease (COVID-19) is seen at an entrance to the American Airlines Arena before a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

Sniffer dogs trained to detect the coronavirus disease (COVID-19) scan people attending a Miami Heat game at the American Airlines Arena in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

Sniffer dogs trained to detect the coronavirus disease (COVID-19) scan people attending a Miami Heat game at the American Airlines Arena in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello TPX IMAGES OF THE DAY

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A worker of the Israeli foreign ministry scans the signed agreement to be sent to Kosovo during a virtual ceremony to establish diplomatic relations between Israel and Kosovo in the Israeli foreign ministry in Jerusalem February 1, 2021 REUTERS/ Amir Cohen

A view of damaged scanning machines and metal detectors at the entrance of the historic Red Fort after Tuesday's clashes between police and farmers, in the old quarters of Delhi, India, January 27, 2021. REUTERS/Adnan Abidi

A visitor looks down at a military personnel scanning the area using binoculars at The U.S. Capitol ahead of the departure of U.S. President Joe Biden and Vice President Kamala Harris after their inauguration ceremony, in Washington, U.S., January 20, 2021. REUTERS/Tom Brenner

A security officer wearing protective gear stands next to passenger temperature scanning machine where she is on duty as Sri Lanka's government scheduled to reopen the country's airports for tourists from January 21, 2021, as they were closed since March 2020 due to spread of coronavirus disease (COVID-19), at Bandaranaike International Airport in Katunayake, Sri Lanka January 20, 2021. REUTERS/Dinuka Liyanawatte

A woman scans a health QR code on her smartphone to register her visit to a market before crossing the entry checkpoint, following the new outbreak of the coronavirus disease (COVID-19), in Beijing, China January 15, 2021. REUTERS/Tingshu Wang

A taxi driver shows a QR code of health registration for a passenger to scan before a ride, following new cases of the coronavirus disease (COVID-19) in the country, in Beijing, China January 11, 2021. REUTERS/Tingshu Wang

People scan a QR code for checking health condition as they enter a market, following new cases of the coronavirus disease (COVID-19) in the country, in Beijing, China January 11, 2021. REUTERS/Tingshu Wang

A Fulton County election worker takes absentee ballots out of a container to scan at the Georgia World Congress Center in Atlanta, Georgia, U.S., January 5, 2021. REUTERS/Elijah Nouvelage

Election observers watch as a Fulton County election worker scans absentee ballots at the Georgia World Congress Center in Atlanta, Georgia, U.S., January 5, 2021. REUTERS/Elijah Nouvelage

An election offfcial shows a voter where to scan her ballot after voting in Georgia’s Senate runoff elections at a Fulton County polling station in Atlanta, Georgia, U.S. January 5, 2021. REUTERS/Elijah Nouvelage

Ryu Han-na, who undergoes nose plastic surgery, gets CT scan at WooAhIn Plastic Surgery Clinic, amid the coronavirus disease (COVID-19) pandemic in Seoul, South Korea, December 17, 2020. Picture taken on December 17, 2020. REUTERS/Kim Hong-Ji

Ryu Han-na, who undergoes nose plastic surgery, gets CT scan at WooAhIn Plastic Surgery Clinic, amid the coronavirus disease (COVID-19) pandemic in Seoul, South Korea, December 17, 2020. Picture taken on December 17, 2020. REUTERS/Kim Hong-Ji

Customer uses a phone to scan the QR code of the electronic payment service Alipay that belongs to Ant Group Co Ltd at a market stall in Beijing, China, December 31, 2020. REUTERS/Thomas Peter

Ryu Han-na, who undergoes nose plastic surgery, gets CT scan at WooAhIn Plastic Surgery Clinic, amid the coronavirus disease (COVID-19) pandemic in Seoul, South Korea, December 17, 2020. Picture taken on December 17, 2020. REUTERS/Kim Hong-Ji

Ryu Han-na, who undergoes nose plastic surgery, gets CT scan at WooAhIn Plastic Surgery Clinic, amid the coronavirus disease (COVID-19) pandemic in Seoul, South Korea, December 17, 2020. Picture taken on December 17, 2020. REUTERS/Kim Hong-Ji

A screen showing thermal scanning to check the temperature of passengers at the Guarulhos airport, is seen amid concerns about the spread of the coronavirus disease (COVID-19), in Guarulhos, Sao Paulo state, Brazil, December 27, 2020. REUTERS/Roosevelt Cassio

A screen showing thermal scanning to check the temperature of passengers at the Guarulhos airport, is seen amid concerns about the spread of the coronavirus disease (COVID-19), in Guarulhos, Sao Paulo state, Brazil, December 27, 2020. REUTERS/Roosevelt Cassio

A security guard directs people to scan a QR code to track their health status before entering a shopping complex, following the new cases of the coronavirus disease (COVID-19) in Beijing, China December 25, 2020. REUTERS/Tingshu Wang

Veterinarians perform an ultrasound scan of a dog at an animal shelter in the rebel-controlled city of Donetsk, Ukraine, December 10, 2020. The animal shelter "Pif" funded by volunteers and supporters hosts and delivers medical care to almost 850 stray dogs and cats waiting for adoption. Picture taken December 10, 2020. REUTERS/Alexander Ermochenko TPX IMAGES OF THE DAY

Veterinarians perform an ultrasound scan of a dog at an animal shelter in the rebel-controlled city of Donetsk, Ukraine, December 10, 2020. The animal shelter "Pif" funded by volunteers and supporters hosts and delivers medical care to almost 850 stray dogs and cats waiting for adoption. Picture taken December 10, 2020. REUTERS/Alexander Ermochenko

A UPS driver scans a box of Pfizer/BioNTEch coronavirus disease (COVID-19) vaccines as it is delivered to the Maimonides long term care home in Montreal, Quebec, Canada December 14, 2020. REUTERS/Christinne Muschi

Boxes containing Pfizer's COVID-19 vaccine are unloaded from air shipping containers and scanned at UPS Worldport, in Louisville, Kentucky, December 13, 2020. Michael Clevenger/Pool via REUTERS

Doctor's assistant Dainis Laugalis scans a saliva test box at a vending machine where people can pick up coronavirus disease (COVID-19) tests and return samples without having to come into contact with others, in Riga, Latvia December 9, 2020. Picture taken December 9, 2020. REUTERS/Janis Laizans

Secret service agents stand in the doorway of Delaware Imaging Network as President-elect Joe Biden arrives to receive a CT scan after twisting his ankle while playing with his dog Major in Newark, Delaware, U.S., November 29, 2020. REUTERS/Joshua Roberts

Secret service agents stand in the doorway of Delaware Imaging Network as President-elect Joe Biden arrives to receive a CT scan after twisting his ankle while playing with his dog Major in Newark, Delaware, U.S., November 29, 2020. REUTERS/Joshua Roberts

An employee scans packages at Amazon's JFK8 distribution center in Staten Island, New York, U.S. November 25, 2020. REUTERS/Brendan McDermid.

Travellers scan a QR code to track their itinerary history at Beijing Capital International Airport, following the global outbreak of the coronavirus disease (COVID-19), in Beijing, China November 22, 2020. REUTERS/Tingshu Wang

A patient undergoes a computed tomography scan inside a pavilion of the Exhibition of Achievements of National Economy (VDNH), which was converted into a temporary hospital for people suffering from the coronavirus disease (COVID-19), in Moscow, Russia November 17, 2020. Picture taken November 17, 2020. REUTERS/Maxim Shemetov

Secondary school student Jackline Bosibori, 17, looks at printed scans of her unborn baby after an ultrasound appointment at a clinic within the Kibera slums in Nairobi, Kenya, October 2, 2020. "I have no one to talk to. My parents have been very harsh towards me," Bosibori said. REUTERS/Monicah Mwangi SEARCH "KENYA LOCKDOWN PREGNANCIES" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Members of the medical personnel wearing full protective suits prepare a patient infected with the coronavirus disease (COVID-19) for a CT scan at Maastricht UMC+ Hospital in Maastricht, Netherlands, November 10, 2020. REUTERS/Piroschka van de Wouw