A woman, wearing a protective face mask, walks past a clothing store amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 4, 2021. REUTERS/Eric Gaillard

A manequin is seen next to a tattoo shop in a deserted street in the old town of Nice amid the coronavirus disease (COVID-19) outbreak in France, March 4, 2021. REUTERS/Eric Gaillard

A vegetable seller, wearing a protective face mask, works on a local market amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 4, 2021. REUTERS/Eric Gaillard

A man, wearing a protective face mask, shops at a local market amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 4, 2021. REUTERS/Eric Gaillard

People, wearing a protective face masks, shop at a local market amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 4, 2021. REUTERS/Eric Gaillard

People, wearing protective face masks, walk at the Trocadero square near the Eiffel tower in Paris amid the coronavirus disease (COVID-19) outbreak in France, March 2, 2021. REUTERS/Gonzalo Fuentes

People, wearing protective face masks, walk on Parisian covered passages amid the coronavirus disease (COVID-19) outbreak in France, March 2, 2021. REUTERS/Gonzalo Fuentes

People take pictures at the Trocadero square near the Eiffel tower in Paris amid the coronavirus disease (COVID-19) outbreak in France, March 2, 2021. REUTERS/Gonzalo Fuentes

A man, wearing a protective face mask, walks on Parisian covered passages amid the coronavirus disease (COVID-19) outbreak in France, March 2, 2021. REUTERS/Gonzalo Fuentes

A woman, wearing a protective face mask, walks on Parisian covered passages amid the coronavirus disease (COVID-19) outbreak in France, March 2, 2021. REUTERS/Gonzalo Fuentes

A woman, wearing a protective face mask, pushes a baby carriage as she walks on Parisian covered passages amid the coronavirus disease (COVID-19) outbreak in France, March 2, 2021. REUTERS/Gonzalo Fuentes

People, wearing protective face masks, walk on Parisian covered passages amid the coronavirus disease (COVID-19) outbreak in France, March 2, 2021. REUTERS/Gonzalo Fuentes

People, wearing protective face masks, walk on Parisian covered passages amid the coronavirus disease (COVID-19) outbreak in France, March 2, 2021. REUTERS/Gonzalo Fuentes

A view shows a Turkish Airlines Boeing 737 parked on the tarmac of Nice Cote d'Azur Airport Terminal 2 amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 1, 2021. REUTERS/Eric Gaillard

A view shows empty boarding gates at Nice Cote d'Azur Airport Terminal 2 amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 1, 2021. REUTERS/Eric Gaillard

A French border police officer controls 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 French border police officer controls 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 view shows easyJet and Air France planes parked on the tarmac of Nice Cote d'Azur Airport Terminal 2 amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 1, 2021. REUTERS/Eric Gaillard

A view shows easyJet and Air France planes parked on the tarmac of Nice Cote d'Azur Airport Terminal 2 amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 1, 2021. REUTERS/Eric Gaillard

A view shows easyJet and Air France planes parked on the tarmac of Nice Cote d'Azur Airport Terminal 2 amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 1, 2021. REUTERS/Eric Gaillard

French border police officers control 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

A French border police officer controls 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

French border police officers control 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 administers a nasal swab to a passenger arriving 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 administers a nasal swab to a passenger arriving at Nice Cote d'Azur Airport amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 1, 2021. REUTERS/Eric Gaillard

A medical workers administers a nasal swab to a passenger arriving at Nice Cote d'Azur international 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 administers a nasal swab to a passenger arriving at Nice Cote d'Azur Airport amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 1, 2021. REUTERS/Eric Gaillard

A view shows an empty Terminal 1 at Nice Cote d'Azur Airport amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 1, 2021. REUTERS/Eric Gaillard

A view shows an empty Terminal 1 at Nice Cote d'Azur Airport amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 1, 2021. REUTERS/Eric Gaillard

A view shows empty boarding gates at Nice Cote d'Azur Airport Terminal 2 amid the coronavirus disease (COVID-19) outbreak in Nice, France, March 1, 2021. REUTERS/Eric Gaillard

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings near the Eiffel Tower in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

Women have a picnic on the rooftop of a residential apartment building in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes TPX IMAGES OF THE DAY

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

An artisan roofer repairs city rooftops and chimney stacks on residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

Olivier Boileau Descamps General secretary at support committee of the UNESCO Commission on intangible cultural heritage walks at city rooftop of a residential apartment building in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A man, wearing a protective face mask, rides his scooter in a local market in Nice amid the coronavirus disease (COVID-19) outbreak in France, February 18, 2021. REUTERS/Eric Gaillard

Fishmongers, wearing protective face masks, work at a local market in Nice amid the coronavirus disease (COVID-19) outbreak in France, February 18, 2021. REUTERS/Eric Gaillard

A florist, wearing a protective face mask, works at a flower stall in a local market in Nice amid the coronavirus disease (COVID-19) outbreak in France, February 18, 2021. REUTERS/Eric Gaillard

People, wearing protective face masks, sit in a local market in Nice amid the coronavirus disease (COVID-19) outbreak in France, February 18, 2021. REUTERS/Eric Gaillard

A man, wearing a protective face mask, shops at a local market in Nice amid the coronavirus disease (COVID-19) outbreak in France, February 18, 2021. REUTERS/Eric Gaillard

A man, wearing a protective face mask, shops at a fishmonger at a local market in Nice amid the coronavirus disease (COVID-19) outbreak in France, February 18, 2021. REUTERS/Eric Gaillard

People, wearing protective face masks, wait at a food stall in the old town of Nice amid the coronavirus disease (COVID-19) outbreak in France, February 18, 2021. REUTERS/Eric Gaillard

People, wearing protective face masks, wait at a food stall in the old town of Nice amid the coronavirus disease (COVID-19) outbreak in France, February 18, 2021. REUTERS/Eric Gaillard

People, wearing protective face masks, wait at a food stall in the old town of Nice amid the coronavirus disease (COVID-19) outbreak in France, February 18, 2021. REUTERS/Eric Gaillard

People, wearing protective face masks, walk at the Flower Market in Nice amid the coronavirus disease (COVID-19) outbreak in France, February 18, 2021. REUTERS/Eric Gaillard

People take their lunch as they enjoy a sunny and warm weather on the Promenade des Anglais in Nice amid the coronavirus disease (COVID-19) outbreak in France, February 18, 2021. REUTERS/Eric Gaillard

People, wearing protective face masks, walk on the Promenade des Anglais in Nice amid the coronavirus disease (COVID-19) outbreak in France, February 18, 2021. REUTERS/Eric Gaillard

People, wearing protective face masks, sit on the beach of the Promenade des Anglais in Nice amid the coronavirus disease (COVID-19) outbreak in France, February 18, 2021. REUTERS/Eric Gaillard

People take their lunch on the Promenade des Anglais in Nice amid the coronavirus disease (COVID-19) outbreak in France, February 18, 2021. REUTERS/Eric Gaillard