Customers register before entering the restaurant Comedor de los Milagros after the city government implemented a QR-code registration system to prevent novel coronavirus spread in Mexico City, Mexico November 25, 2020. REUTERS/Henry Romero

Customers register before entering the restaurant Comedor de los Milagros after the city government implemented a QR-code registration system to prevent novel coronavirus spread in Mexico City, Mexico November 25, 2020. REUTERS/Henry Romero

A man wearing a face mask walks past signs of the "LeaveHomeSafe" mobile app, a QR health code system to track people's health status amid the coronavirus disease (COVID-19) outbreak, at a building in Hong Kong, China November 25, 2020. REUTERS/Lam Yik

A sign introducing the "LeaveHomeSafe" mobile app, a QR health code system to track people's health status amid the coronavirus disease (COVID-19) outbreak, is seen on a notice board at a building in Hong Kong, China November 25, 2020. REUTERS/Lam Yik

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 QR code is seen before a funeral service with social distancing measures due to the coronavirus disease (COVID-19) outbreak, at St Mary's Church in Milton Keynes, Britain, November 18, 2020. REUTERS/Andrew Boyers

A Code Enforcement officer removes a U.S. President Donald Trump and Vice President Mike Pence campaign sign from the entrance of a polling station during the 2020 U.S. presidential election in Palm Beach, Florida, U.S., November 3, 2020. REUTERS/Marco Bello

A Code Enforcement officer asks to a supporter to stop placing U.S. President Donald Trump and Vice President Mike Pence campaign signs in the limits of a polling station during the 2020 U.S. presidential election in Palm Beach, Florida, U.S., November 3, 2020. REUTERS/Marco Bello TPX IMAGES OF THE DAY

A QR code of digital payment device Alipay by Ant Group, an affiliate of Alibaba Group Holding, is seen at a watch repair shop inside a market, in Beijing, China November 2, 2020. REUTERS/Tingshu Wang

A QR code of digital payment device Alipay by Ant Group, an affiliate of Alibaba Group Holding, is seen at a grocery shop inside a market, in Beijing, China November 2, 2020. REUTERS/Tingshu Wang

A QR code of digital payment device Alipay by Ant Group, an affiliate of Alibaba Group Holding, is seen at a food stall inside a market, in Beijing, China November 2, 2020. REUTERS/Tingshu Wang

A QR code of digital payment device Alipay by Ant Group, an affiliate of Alibaba Group Holding, is seen next to a QR code of WeChat Pay at a food stall inside a market, in Beijing, China November 2, 2020. REUTERS/Tingshu Wang

A QR code of digital payment device Alipay by Ant Group, an affiliate of Alibaba Group Holding, is seen at a food stall inside a market, in Beijing, China November 2, 2020. REUTERS/Tingshu Wang

A QR code of digital payment device Alipay by Ant Group, an affiliate of Alibaba Group Holding, is seen at a grocery shop inside a market, in Beijing, China November 2, 2020. REUTERS/Tingshu Wang

A person gets a scan of a phone's QR code of the digital payment services at a food shop, following the coronavirus disease (COVID-19) outbreak, in Shanghai, China October 10, 2020. REUTERS/Aly Song

A QR code of the digital payment service WeChat Pay is seen at a shop, following the coronavirus disease (COVID-19) outbreak, in Shanghai, China October 10, 2020. REUTERS/Aly Song

A woman gets her phone's QR code of the digital payment services scanned at a food shop, following the coronavirus disease (COVID-19) outbreak, in Shanghai, China October 10, 2020. REUTERS/Aly Song

A woman gets her phone's QR code of the digital payment services scanned at a food shop, following the coronavirus disease (COVID-19) outbreak, in Shanghai, China October 10, 2020. REUTERS/Aly Song

A woman gets her phone's QR code of the digital payment services scanned at a food shop, following the coronavirus disease (COVID-19) outbreak, in Shanghai, China October 10, 2020. REUTERS/Aly Song

A QR code for the NHS coronavirus app is seen next to a hand sanitiser dispenser outside a bar following the outbreak of the coronavirus disease (COVID-19) in Manchester, Britain, October 5, 2020. REUTERS/Phil Noble

White House aides, including the military aide carrying the nuclear launch codes known as "the nuclear football," follow U.S. President Donald Trump as he boards the Marine One helicopter to depart the White House and fly to Walter Reed National Military Medical Center, where it was announced he will stay for at least several days after testing positive for the coronavirus disease (COVID-19), on the South Lawn of the White House in Washington, U.S., October 2, 2020. REUTERS/Leah Millis

A woman takes a picture of giant QR code that promotes the new NHS COVID-19 app and it is placed next to the entrance of the MK Gallery, amid the spread of the coronavirus disease (COVID-19) in Milton Keynes, Britain September 25, 2020. REUTERS/Andrew Boyers

A giant QR code that promotes the new NHS COVID-19 app is placed next to the entrance of the MK Gallery, amid the spread of the coronavirus disease (COVID-19) in Milton Keynes, Britain September 25, 2020. REUTERS/Andrew Boyers

A giant QR code that promotes the new NHS COVID-19 app is placed next to the entrance of the MK Gallery, amid the spread of the coronavirus disease (COVID-19) in Milton Keynes, Britain September 25, 2020. REUTERS/Andrew Boyers

A giant QR code that promotes the new NHS COVID-19 app is placed next to the entrance of the MK Gallery, amid the spread of the coronavirus disease (COVID-19) in Milton Keynes, Britain September 25, 2020. REUTERS/Andrew Boyers

People scan a QR code to check their health before entering the Seasons Place Shopping Mall at the Beijing Financial Street, following the coronavirus disease (COVID-19) outbreak, in Beijing, China September 23, 2020. REUTERS/Tingshu Wang

QR codes for WeChat Pay and Alipay are seen at a market in Beijing, China September 18, 2020. REUTERS/Tingshu Wang

A customer scans a QR code to access the Andres Carne de Res restaurant menu, amidst the coronavirus disease (COVID-19) outbreak, in Chia, Colombia August 30, 2020. Picture taken August 30, 2020. REUTERS/Luisa Gonzalez

A staff member holds a thermometer for temperature checks as he requires people to scan a health code at the entrance of the Maple Garden Drive-in Cinema, during Beijing International Film Festival following the coronavirus disease (COVID-19) outbreak, in Beijing, China August 24, 2020. REUTERS/Tingshu Wang

A staff member checks people's health code as they enter the Maple Garden Drive-in Cinema for an outdoor movie projection during Beijing International Film Festival, following the coronavirus disease (COVID-19) outbreak, in Beijing, China August 24, 2020. REUTERS/Tingshu Wang

A worker scans a WeChat Pay QR code to buy a takeaway meal for lunch near a construction site, following the coronavirus disease (COVID-19) outbreak, in Beijing, China August 21, 2020. REUTERS/Tingshu Wang

QR codes of the digital payment services WeChat Pay and its competitor Alipay are seen at a meat stall at a fresh market in Beijing, China August 8, 2020. REUTERS/Thomas Peter

A person scans the QR code of the digital payment services WeChat Pay at a fresh market in Beijing, China August 8, 2020. REUTERS/Thomas Peter

A QR code of the digital payment services WeChat Pay is seen at a fish monger at a fresh market in Beijing, China August 8, 2020. REUTERS/Thomas Peter

QR codes of the digital payment services WeChat Pay and its competitor Alipay are seen at a meat stall at a fresh market in Beijing, China August 8, 2020. REUTERS/Thomas Peter

QR codes of the digital payment services WeChat Pay and its competitor Alipay are seen at a meat stall at a fresh market in Beijing, China August 8, 2020. REUTERS/Thomas Peter

Khaled Mohamed al-Ahmed, 52, displays a picture of his deceased nephew on a mobile phone, that he says was identified among thousands of images, smuggled out of Syria by a former Syrian military photographer code-named Caesar, that show bodies of dead detainees in Syrian government detention facilities, at an internally displaced persons camp tent in the opposition-held Idlib, Syria, July 11, 2020. Picture taken July 11, 2020. REUTERS/Khalil Ashawi

Jouriya Ali, 74, displays a picture of her deceased son on a mobile phone, that she says was identified among thousands of images, smuggled out of Syria by a former Syrian military photographer code-named Caesar, that show bodies of dead detainees in Syrian government detention facilities, at an internally displaced persons camp tent in the opposition-held Idlib, Syria, July 7, 2020. Picture taken July 7, 2020. REUTERS/Khalil Ashawi

A QR code of the digital payment service WeChat Pay is seen at a shop in Beijing, China August 6, 2020. REUTERS/Thomas Peter

QR codes of the digital payment services WeChat Pay and Alipay are seen at a shop in Beijing, China August 6, 2020. REUTERS/Thomas Peter

A client using his mobile phone scans the QR code to place an order of a pizza with its ingredientes through of the "Funky Pay" app, where the app replaces waiters at Funky Pizza restaurant in Palafrugell, near Girona, Costa Brava, Spain July 31, 2020. Picture taken July 31, 2020. REUTERS/Nacho Doce

A client using his mobile phone scans a QR code to place an order of a pizza with its ingredientes through the "Funky Pay" app, which replaces waiters, at Funky Pizza restaurant in Palafrugell, near Girona, Costa Brava, Spain July 31, 2020. Picture taken July 31, 2020. REUTERS/Nacho Doce

A U.S. military aide carries what is known as the "nuclear football" with nuclear launch codes to Air Force One as U.S. President Donald Trump departs Washington for travel to Florida at Joint Base Andrews, Maryland, U.S., July 31, 2020. REUTERS/Tom Brenner

A couple sits on a bike, waiting for a group of Protestants during a religious march against some articles of the draft of the new Haitian penal code, in the streets of Port-au-Prince, Haiti July 26, 2020. T-shirts read in Haitian Creole "Long live the family". REUTERS/Andres Martinez Casares

Protestants, some using protective masks as COVID-19 spreads in the country, take part in a religious march to protest against some articles of the draft of the new Haitian penal code, in Port-au-Prince, Haiti July 26, 2020. REUTERS/Andres Martinez Casares

Protestants, some using protective masks as COVID-19 spreads in the country, take part in a religious march to protest against some articles of the draft of the new Haitian penal code, in Port-au-Prince, Haiti July 26, 2020. REUTERS/Andres Martinez Casares

A Protestant walks, wearing a Haitian flag and a protective mask, as COVID-19 spreads in the country, in a religious march against some articles of the draft of the new Haitian penal code, in the streets of Port-au-Prince, Haiti July 26, 2020. REUTERS/Andres Martinez Casares

Protestants take part in a religious march to protest against some articles of the draft of the new Haitian penal code, in the streets of Port-au-Prince, Haiti, July 26, 2020. REUTERS/Andres Martinez Casares TPX IMAGES OF THE DAY

Protestants take part in a religious march to protest against some articles of the draft of the new Haitian penal code, in the streets of Port-au-Prince, Haiti, July 26, 2020. REUTERS/Andres Martinez Casares

A Meituan delivery worker wearing a face mask, following the outbreak of the coronavirus disease (COVID-19), shows his health code to a security guard while his temperature is being checked by a face recognition scanner, as he enters a rider station at an office building, in Beijing's Central Business District, China July 15, 2020. REUTERS/Tingshu Wang

A voter wearing a face mask following the coronavirus disease (COVID-19) outbreak scans a QR code during the primary election aimed at selecting democracy candidates for the September election, in Hong Kong, China July 12, 2020. REUTERS/Lam Yik

Voters screen a QR code to vote during primary elections aimed for selecting democracy candidates, in Hong Kong, China July 11, 2020. REUTERS/Tyrone Siu

A woman shops using QR code at a cosmetic shop in a department store in Seoul, South Korea, July 2, 2020. Picture taken July 2, 2020. REUTERS/Heo Ran

Visitors scan QR codes to receive Zoo's map, as printed brochures are not distributed to avoid contagion, as Madrid's zoo reopens its doors after more than three months of lockdown caused by the coronavirus disease (COVID-19) outbreak in Madrid, June 23, 2020. REUTERS/Susana Vera

Google Chrome logo is seen near cyber code and words "spy" in this illustration picture taken June 18, 2020. REUTERS/Dado Ruvic/Illustration

Google Chrome logo is seen near cyber code and words "spy" in this illustration picture taken June 18, 2020. REUTERS/Dado Ruvic/Illustration

Google Chrome logo is seen near cyber code and words "spy" in this illustration picture taken June 18, 2020. REUTERS/Dado Ruvic/Illustration

A security guard holds a QR code for registration while a community volunteer takes temperatures of people on their vehicles at an entrance to a hutong, following new cases of the coronavirus disease (COVID-19) infections, in Beijing, China June 18, 2020. REUTERS/Tingshu Wang

A customer scans a QR code to pay for vegetables inside the Yuegezhuang wholesale market, following new cases of coronavirus disease (COVID-19) infections in Beijing, China June 17, 2020. REUTERS/Tingshu Wang

A bottle of alcohol and a notice with a QR code for a customer health declaration are placed before the entrance of a restaurant as the Philippine government allows dining-in following months of restrictions due to the coronavirus disease (COVID-19) outbreak, in Mandaluyong City, Metro Manila, Philippines, June 16, 2020. REUTERS/Eloisa Lopez