People wearing face masks walk as a hygiene control staff member stands at a Christmas market as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, November 30, 2021. REUTERS/Michele Tantussi 

Mannequins wearing masks and makeshift face shields are displayed in a retail store amid the coronavirus disease (COVID-19) outbreak, in Quezon City, Metro Manila, Philippines, July 13, 2020. REUTERS/Eloisa Lopez 

Cloth masks are displayed in a department store amid the coronavirus disease (COVID-19) outbreak, in Quezon City, Metro Manila, Philippines, July 13, 2020. REUTERS/Eloisa Lopez 

Mannequins wearing masks and makeshift face shields are displayed in a retail store amid the coronavirus disease (COVID-19) outbreak, in Quezon City, Metro Manila, Philippines, July 13, 2020. REUTERS/Eloisa Lopez 

Face masks are displayed in a department store amid the coronavirus disease (COVID-19) outbreak, in Quezon City, Metro Manila, Philippines, July 13, 2020. REUTERS/Eloisa Lopez 

Masks, face shields, disinfectants, and other cleaning products are displayed on a shelf marked with "COVID essentials" in a retail store amid the coronavirus disease (COVID-19) outbreak, in Quezon City, Metro Manila, Philippines, July 13, 2020. REUTERS/Eloisa Lopez 

A man wearing a protective face mask works in a temporary hygiene station, as the spread of the coronavirus disease (COVID-19) continues, in London, Britain June 23, 2020. REUTERS/Toby Melville 

A man wearing a protective face mask works in a temporary hygiene station, as the spread of the coronavirus disease (COVID-19) continues, in London, Britain June 23, 2020. REUTERS/Toby Melville 

A man wearing a protective face mask and gloves works in a temporary hygiene station, as the spread of the coronavirus disease (COVID-19) continues, in London, Britain June 23, 2020. REUTERS/Toby Melville 

A man wearing a protective face mask and gloves works in a temporary hygiene station, as the spread of the coronavirus disease (COVID-19) continues, in London, Britain June 23, 2020. REUTERS/Toby Melville 

A visitor wearing a face mask poses for a picture as Italy's La Scala opera house reopens to the public for the first time since the coronavirus disease (COVID-19) outbreak, with new social distancing and hygiene rules, in Milan, Italy, June 21, 2020. REUTERS/Flavio Lo Scalzo 

Visitors wearing face masks take pictures as Italy's La Scala opera house reopens to the public for the first time since the coronavirus disease (COVID-19) outbreak, with new social distancing and hygiene rules, in Milan, Italy, June 21, 2020. REUTERS/Flavio Lo Scalzo 

Visitors wearing face masks look on as Italy's La Scala opera house reopens to the public for the first time since the coronavirus disease (COVID-19) outbreak, with new social distancing and hygiene rules, in Milan, Italy, June 21, 2020. REUTERS/Flavio Lo Scalzo 

A visitor wearing a face mask looks on as Italy's La Scala opera house reopens to the public for the first time since the coronavirus disease (COVID-19) outbreak, with new social distancing and hygiene rules, in Milan, Italy, June 21, 2020. REUTERS/Flavio Lo Scalzo 

A visitor wearing a face mask looks on as Italy's La Scala opera house reopens to the public for the first time since the coronavirus disease (COVID-19) outbreak, with new social distancing and hygiene rules, in Milan, Italy, June 21, 2020. REUTERS/Flavio Lo Scalzo TPX IMAGES OF THE DAY 

A visitor wearing a face mask takes a selfie as Italy's La Scala opera house reopens to the public for the first time since the coronavirus disease (COVID-19) outbreak, with new social distancing and hygiene rules, in Milan, Italy, June 21, 2020. REUTERS/Flavio Lo Scalzo 

A person wearing a face mask takes a picture as Italy's La Scala opera house reopens to the public for the first time since the coronavirus disease (COVID-19) outbreak, with new social distancing and hygiene rules, in Milan, Italy, June 21, 2020. REUTERS/Flavio Lo Scalzo 

People wearing protective masks walk past a public health announcement banner, after a new outbreak of the coronavirus disease (COVID-19), in Beijing, China, June 19, 2020. The banner reads: ''Wear face masks, wash hands frequently, keep the room ventilated, maintain good hygiene habits''. REUTERS/Thomas Peter 

A woman wearing a face mask cleans a wine shop, amid the outbreak of the coronavirus disease (COVID-19), in Adjame a neighbourhood of Abidjan, Ivory Coast June 17, 2020. REUTERS/Thierry Gouegnon 

A woman wearing a face mask cleans a wine shop, amid the outbreak of the coronavirus disease (COVID-19), in Adjame a neighbourhood of Abidjan, Ivory Coast June 17, 2020. REUTERS/Thierry Gouegnon 

A woman wearing a face mask cleans a wine shop window ,amid the outbreak of the coronavirus disease (COVID-19), in Adjame a neighbourhood of Abidjan, Ivory Coast June 17, 2020. REUTERS/Thierry Gouegnon 

Employees of German airline Lufthansa wear protective masks as they wait for passengers at a boarding gate during a guided tour hosted by Fraport airport and the airline to present their hygiene procedures as travel bans are lifted after the coronavirus disease (COVID-19) outbreak at the airport in Frankfurt, Germany, June 17, 2020. REUTERS/Kai Pfaffenbach 

An employee of German airline Lufthansa wears a protective mask as she waits for passengers at a check-in counter during a guided tour hosted by Fraport airport and the airline to present their hygiene procedures as travel bans are lifted after the coronavirus disease (COVID-19) outbreak at the airport in Frankfurt, Germany, June 17, 2020. REUTERS/Kai Pfaffenbach 

Employees of German airline Lufthansa wear protective masks as they wait for passengers at a boarding gate during a guided tour hosted by Fraport airport and the airline to present their hygiene procedures as travel bans are lifted after the coronavirus disease (COVID-19) outbreak at the airport in Frankfurt, Germany, June 17, 2020. REUTERS/Kai Pfaffenbach 

Employees of German airline Lufthansa wear protective masks as they wait for passengers at a boarding gate during a guided tour hosted by Fraport airport and the airline to present their hygiene procedures as travel bans are lifted after the coronavirus disease (COVID-19) outbreak at the airport in Frankfurt, Germany, June 17, 2020. REUTERS/Kai Pfaffenbach 

An employee of Fraport airport offers face masks prior to security check during a guided tour hosted by Fraport airport and the airline to present their hygiene procedures as travel bans are lifted after the coronavirus disease (COVID-19) outbreak at the airport in Frankfurt, Germany, June 17, 2020. REUTERS/Kai Pfaffenbach 

An employee of German airline Lufthansa wears a protective mask as she waits for passengers at a boarding gate during a guided tour hosted by Fraport airport and the airline to present their hygiene procedures as travel bans are lifted after the coronavirus disease (COVID-19) outbreak at the airport in Frankfurt, Germany, June 17, 2020. REUTERS/Kai Pfaffenbach 

Face masks for sale are displayed outside a shop amid the coronavirus disease (COVID-19) outbreak in Rome, Italy, June 9, 2020. Picture taken June 9, 2020. REUTERS/Guglielmo Mangiapane 

Face masks for sale are displayed outside a shop amid the coronavirus disease (COVID-19) outbreak in Rome, Italy, June 9, 2020. Picture taken June 9, 2020. REUTERS/Guglielmo Mangiapane 

Protective face masks are pictured on the counter of a specialist warehouse for professional cleaning firms amid the coronavirus disease (COVID-19) outbreak in Rome, Italy, June 10, 2020. Picture taken June 10, 2020. REUTERS/Guglielmo Mangiapane. 

A Palestinian man wearing a mask looks on as he stands in front of disinfectants and cleaning products in a supermarket amid the coronavirus disease (COVID-19) crisis, in the southern Gaza Strip June 9, 2020. REUTERS/Ibraheem Abu Mustafa 

A Palestinian man wearing a mask pushes a cart with disinfectants in a supermarket amid the coronavirus disease (COVID-19) crisis, in the southern Gaza Strip June 9, 2020. REUTERS/Ibraheem Abu Mustafa 

A woman wearing a protective face mask waits to measure her temperature in an Apple Store following the coronavirus disease (COVID-19) outbreak, in Shanghai, China June 8, 2020. REUTERS/Aly Song 

A man wearing a face mask rides a bike next to another one walking past a banner of the Uffizi Gallery on the day of its reopening with new social distancing and hygiene rules in place after months of closure due to the outbreak of the coronavirus disease (COVID-19), in Florence, Italy, June 2, 2020. REUTERS/Jennifer Lorenzini 

A woman wearing a protective mask disinfects her hands as she attends a preview for the media during the reopening of the Uffizi Gallery with new social distancing and hygiene rules in place after months of closure due to the outbreak of the coronavirus disease (COVID-19), in Florence, Italy, June 2, 2020. REUTERS/Jennifer Lorenzini 

A man wearing a protective mask looks at the painting "Mary, Christ and the young John the Baptist", known as the "Madonna of the Goldfinch" by Raffaello Sanzio during a preview for the media as the Uffizi Gallery reopens with new social distancing and hygiene rules in place after months of closure due to the outbreak of the coronavirus disease (COVID-19), in Florence, Italy, June 2, 2020. REUTERS/Jennifer Lorenzini 

A member of the media wearing a protective mask has her temperature checked as she attends a preview for the media during the reopening of the Uffizi Gallery with new social distancing and hygiene rules in place after months of closure due to the outbreak of the coronavirus disease (COVID-19), in Florence, Italy, June 2, 2020. REUTERS/Jennifer Lorenzini 

A journalist wearing a face mask takes a picture of a painting as she attends a preview for the media during the reopening of the Uffizi Gallery with new social distancing and hygiene rules in place after months of closure due to the outbreak of the coronavirus disease (COVID-19), in Florence, Italy, June 2, 2020. REUTERS/Jennifer Lorenzini 

Journalists wearing face masks stand in front of the painting Holy Family, by Michelangelo Buonarroti, as they attend a preview for the media during the reopening of the Uffizi Gallery with new social distancing and hygiene rules in place after months of closure due to the outbreak of the coronavirus disease (COVID-19), in Florence, Italy, June 2, 2020. REUTERS/Jennifer Lorenzini 

Director of the Uffizi Gallery Eike Dieter Schmidt poses with a face mask with the colours of the Italian flag in front of the painting The Birth of Venus, by Sandro Botticelli, during the reopening of the gallery with new social distancing and hygiene rules in place after months of closure due to the outbreak of the coronavirus disease (COVID-19), in Florence, Italy, June 2, 2020. REUTERS/Jennifer Lorenzini 

Director of the Uffizi Gallery Eike Dieter Schmidt wears a face mask with the Italian flag as he poses during the reopening of the gallery with new social distancing and hygiene rules in place after months of closure due to the outbreak of the coronavirus disease (COVID-19), in Florence, Italy, June 2, 2020. REUTERS/Jennifer Lorenzini 

Director of the Uffizi Gallery Eike Dieter Schmidt wears a face mask with the Italian flag as he poses during the reopening of the gallery with new social distancing and hygiene rules in place after months of closure due to the outbreak of the coronavirus disease (COVID-19), in Florence, Italy, June 2, 2020. REUTERS/Jennifer Lorenzini 

A woman wearing a protective face mask looks on at Rome's ancient Colosseum as it is being reopened with social distancing and hygiene measures in place, after months of closure due to the spread of the coronavirus disease (COVID-19), in Rome, Italy June 1, 2020. REUTERS/Yara Nardi 

Members of the media wearing protective face masks are seen at Rome's ancient Colosseum as it is being reopened with social distancing and hygiene measures in place after months of closure due to the spread of the coronavirus disease (COVID-19), in Rome, Italy June 1, 2020. REUTERS/Yara Nardi 

Journalists wearing protective face masks are seen at Rome's ancient Colosseum as it is being reopened with social distancing and hygiene measures in place after months of closure due to the spread of the coronavirus disease (COVID-19), in Rome, Italy June 1, 2020. REUTERS/Yara Nardi 

An Egon Schiele's pictogram shows hygienic rules, nexto to a visitor wearing a protective face mask on first day of reopening at Leopold museum, during the global coronavirus disease (COVID-19) outbreak in Vienna, Austria, May 27, 2020. REUTERS/Lisi Niesner 

An Italian tourist wearing a protective face mask visits the archaeological site of the ancient Roman city of Pompeii as it reopens to the public with social distancing and hygiene rules, after months of closure due to an outbreak of the coronavirus disease (COVID-19), in Pompeii, Italy, May 26, 2020. REUTERS/Ciro De Luca 

Italian tourists wearing protective face masks visit the archaeological site of the ancient Roman city of Pompeii as it reopens to the public with social distancing and hygiene rules, after months of closure due to an outbreak of the coronavirus disease (COVID-19), in Pompeii, Italy, May 26, 2020. REUTERS/Ciro De Luca 

Italian tourists wearing protective face masks visit the archaeological site of the ancient Roman city of Pompeii as it reopens to the public with social distancing and hygiene rules, after months of closure due to an outbreak of the coronavirus disease (COVID-19), in Pompeii, Italy, May 26, 2020. REUTERS/Ciro De Luca 

Italian tourists wearing protective face masks visit the archaeological site of the ancient Roman city of Pompeii as it reopens to the public with social distancing and hygiene rules, after months of closure due to an outbreak of the coronavirus disease (COVID-19), in Pompeii, Italy, May 26, 2020. REUTERS/Ciro De Luca 

An Italian tourist wearing a protective face mask visits the archaeological site of the ancient Roman city of Pompeii as it reopens to the public with social distancing and hygiene rules, after months of closure due to an outbreak of the coronavirus disease (COVID-19), in Pompeii, Italy, May 26, 2020. REUTERS/Ciro De Luca 

An Italian tourist wearing a protective face mask sits down as she visits the archaeological site of the ancient Roman city of Pompeii, which reopens to the public with social distancing and hygiene rules, after months of closure due to an outbreak of the coronavirus disease (COVID-19), in Pompeii, Italy, May 26, 2020. REUTERS/Ciro De Luca 

Italian tourists wearing protective face masks visit the archaeological site of the ancient Roman city of Pompeii as it reopens to the public with social distancing and hygiene rules, after months of closure due to an outbreak of the coronavirus disease (COVID-19), in Pompeii, Italy, May 26, 2020. REUTERS/Ciro De Luca 

Italian tourists wearing protective face masks visit the archaeological site of the ancient Roman city of Pompeii as it reopens to the public with social distancing and hygiene rules, after months of closure due to an outbreak of the coronavirus disease (COVID-19), in Pompeii, Italy, May 26, 2020. REUTERS/Ciro De Luca 

Italian tourists wearing protective face masks visit the archaeological site of the ancient Roman city of Pompeii as it reopens to the public with social distancing and hygiene rules, after months of closure due to an outbreak of the coronavirus disease (COVID-19), in Pompeii, Italy, May 26, 2020. REUTERS/Ciro De Luca 

Italian tourists wearing protective face masks arrive to visit the archaeological site of the ancient Roman city of Pompeii as it reopens to the public with social distancing and hygiene rules, after months of closure due to an outbreak of the coronavirus disease (COVID-19), in Pompeii, Italy, May 26, 2020. REUTERS/Ciro De Luca 

Italian tourists wearing protective face masks visit the archaeological site of the ancient Roman city of Pompeii as it reopens to the public with social distancing and hygiene rules, after months of closure due to an outbreak of the coronavirus disease (COVID-19), in Pompeii, Italy, May 26, 2020. REUTERS/Ciro De Luca 

An Italian tourist wearing a protective face mask gets her temperature measured at the entrance of the archaeological site of the ancient Roman city of Pompeii, as it reopens to the public with social distancing and hygiene rules after months of closure due to an outbreak of the coronavirus disease (COVID-19), in Pompeii, Italy, May 26, 2020. REUTERS/Ciro De Luca 

A staff member, wearing a face mask looks at a swimming woman, as the swimming pool at the Sporting Club Ostiense reopens with new social distancing and hygiene rules after months of closure due to an outbreak of the coronavirus disease (COVID-19), in Rome, Italy, May 25, 2020. REUTERS/Guglielmo Mangiapane 

A staff member, wearing a face mask, speaks with a woman as the swimming pool at the Sporting Club Ostiense reopens with new social distancing and hygiene rules after months of closure due to an outbreak of the coronavirus disease (COVID-19), in Rome, Italy, May 25, 2020. REUTERS/Guglielmo Mangiapane