Commuters, wearing protective face masks, walk on a platform at the Saint-Lazare train station in Paris, on the first day mask usage is mandatory in public transport, after France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19) in France, May 11, 2020. REUTERS/Charles Platiau

Passengers wearing protective face masks check schedules as they stand on circles to respect social distancing at the Gare Saint Lazare railway station in Paris, on the first day mask usage is mandatory in public transport, after France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19) France, May 11, 2020.

People wearing protective face masks walk on a platform at a metro station of Paris transport network (RATP) in Paris as France softens its strict lockdown rules during the outbreak of the coronavirus disease (COVID-19) in France, May 11, 2020.

An employee of the tramway wearing a protective face mask stands on the platform in Nice, on the first day mask usage is mandatory in public transport, as France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19), in Nice, France, May 11, 2020.

People collect free protective face masks from Region Ile de France representatives as they arrive at Saint-Lazare train station in Paris, on the first day mask usage is mandatory in public transport, after France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19) in France, May 11, 2020.

Paris Public Transport (RATP) employees prepare to give alcoholic gel to commuters at a subway station, as the country began easing lockdown restrictions amid the coronavirus disease (COVID-19) outbreak, in Paris, France May 11, 2020. Rafael Yaghobzadeh/Pool via REUTERS

A man wearing a protective face mask walks at the financial and business district of La Defense near Paris as France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19), May 11, 2020.

Jockeys are seen wearing protective face masks at the start of Prix Des Nenuphars race as horse racing resumes behind closed doors at Longchamp in Paris as France softens its strict lockdown rules during the outbreak of the coronavirus disease (COVID-19) in France, May 11, 2020.

People wait observing social distancing oustide a Zara shop in Paris as France softens its strict lockdown rules during the outbreak of the coronavirus disease (COVID-19) in France, May 11, 2020.

People, wearing protective face masks, wait observing social distancing oustide a Zara shop in Paris as France softens its strict lockdown rules during the outbreak of the coronavirus disease (COVID-19) in France, May 11, 2020.

People stand outside the reopened Dior boutique place Vendome in Paris after France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19) in France, May 11, 2020.

Commuters, wearing protective face masks, walk on a platform at the Saint-Lazare train station in Paris, on the first day mask usage is mandatory in public transport, after France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19) in France, May 11, 2020.

People wearing protective face masks walk at the financial and business district of La Defense near Paris as France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19), May 11, 2020.

People wearing protective face masks ride the metro in a rush hour in Paris as France softens its strict lockdown rules during the outbreak of the coronavirus disease (COVID-19) in France, May 11, 2020.

Commuters, wearing protective face masks, walk on a platform at the Saint-Lazare train station in Paris, on the first day mask usage is mandatory in public transport, after France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19) in France, May 11, 2020.

Passengers wearing protective face masks check schedules at the Gare Saint Lazare railway station in Paris, on the first day mask usage is mandatory in public transport, after France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19) in France, May 11, 2020.

Jockeys are seen wearing protective face masks at the start of Prix de Fleurus race as horse racing resumes behind closed doors at Longchamp in Paris as France softens its strict lockdown rules during the outbreak of the coronavirus disease (COVID-19) in France, May 11, 2020.

A hairdresser wearing a protective face mask colors the hair of customer in Nice as France softens its strict lockdown rules during the outbreak of the coronavirus disease (COVID-19) in France, May 11, 2020.

Commuters, wearing protective face masks, leave the Saint-Lazare train station in Paris, on the first day mask usage is mandatory in public transport, after France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19) in France, May 11, 2020.

French hairdresser Marc Mauny tends to his first customer during the re-opening of Marc Creations hair salon at midnight in Mayenne, as France softens its strict lockdown rules during the outbreak of the coronavirus disease (COVID-19), May 11, 2020.

People wearing protective face masks walk at the financial and business district of La Defense near Paris as France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19), May 11, 2020.

People stand on signs to respect social distancing on a platform for the tramway in Nice as France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19), France, May 11, 2020.

Christian Estrosi, Mayor of Nice, wearing a protective face mask, stands on the platform of the tramway in Nice, on the first day mask usage is mandatory in public transport, after France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19), France, May 11, 2020.

Passengers wearing protective face masks wait for the departure of their train at the Gare Saint Lazare railway station in Paris, on the first day mask usage is mandatory in public transport, after France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19) in France, May 11, 2020.

Passengers wearing protective face masks check schedules at the Gare Saint Lazare railway station in Paris, on the first day mask usage is mandatory in public transport, after France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19) in France, May 11, 2020.

JCDecaux employees install hydroalcoholic solution dispensers at a bus station in a street in Paris as France softens its strict lockdown rules during the outbreak of the coronavirus disease (COVID-19) in France, May 11, 2020.

Customers queue up at the reopened main shop of French luxury group Hermes in Paris after France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19) in France, May 11, 2020.

People wearing protective face masks ride the metro in a rush hour in Paris as France softens its strict lockdown rules during the outbreak of the coronavirus disease (COVID-19) in France, May 11, 2020.

A man wearing a protective face mask rides the tramway in Nice, on the first day mask usage is mandatory in public transport, as France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19), France, May 11, 2020.

Police forces check passengers arriving at the Saint-Lazare train station in Paris on the first day mask usage is mandatory in public transport, after France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19) in France, May 11, 2020.

French hairdresser Marc Mauny tends to his first customer during the re-opening of Marc Creations hair salon at midnight in Mayenne, as France softens its strict lockdown rules during the outbreak of the coronavirus disease (COVID-19), May 11, 2020.

President of Paris city's RATP transport services Catherine Guillouard and Transport Minister Jean-Baptiste Djebbari sanitize their hands before entering a subway station, as the country began easing lockdown restrictions amid the coronavirus disease (COVID-19) outbreak, in Paris, France May 11, 2020. Rafael Yaghobzadeh/Pool via REUTERS

A barber, wearing a protective face mask and a protective shield, cuts a customer's beard at a Barber Shop in Paris as France softens its strict lockdown rules during the outbreak of the coronavirus disease (COVID-19) in France, May 11, 2020.

A hairdresser, wearing a protective face mask and gloves, cuts the hair of a customer at a Barber Shop in Paris as France softens its strict lockdown rules during the outbreak of the coronavirus disease (COVID-19) in France, May 11, 2020.