A homeless man lies on the stairs near the deserted Place de l'Opera in Paris during the outbreak of Coronavirus disease (COVID-19) in France, March 27, 2020.

Medical staff, wearing protective suits and face masks, work at the intensive care unit for coronavirus disease (COVID-19) patients at Ambroise Pare clinic in Neuilly-sur-Seine near Paris, as the spread of the coronavirus disease continues in France, April 1, 2020.

A patient suffering from coronavirus disease (COVID-19) wears a full-face Easybreath snorkelling mask given by sport chain Decathlon and turned into a ventilator for coronavirus treatment at the intensive care unit at Ambroise Pare clinic in Neuilly-sur-Seine near Paris, as the spread of the coronavirus disease continues in France, April 1, 2020. Image used for illustrative purpose.

A member of the medical staff, wearing protective suit and face mask, talks to a patient at an emergency COVID-19 center inside a gymnasium in Champigny-sur-Marne near Paris as the spread of the coronavirus disease continues in France, March 31, 2020.

Residents exercise on their balconies following fitness trainers in Nantes as a lockdown is imposed to slow the rate of the coronavirus disease (COVID-19) spread in France, March 27, 2020.

French President Emmanuel Macron wearing a protective suit and a face mask visits the Kolmi-Hopen protective face masks factory, following an outbreak of the coronavirus disease (COVID-19), in Saint-Barthelemy-d'Anjou near Angers, France March 31, 2020. Loic Venance/Pool via REUTERS

Doctor Jean-Noel Lepront, wearing protective suit and face mask, makes a phone call outside an emergency COVID-19 center inside a gymnasium in Champigny-sur-Marne near Paris as the spread of the coronavirus disease continues in France, March 31, 2020.

A patient, infected with coronavirus disease (COVID-19), is carried on a stretcher into a Caiman helicopter from the French army during transfer operations from Strasbourg to Germany and Switzerland, France March 30, 2020.

An employee delivers a coffin at the Fondation Rothschild retirement home (Ehpad) in Paris where 16 residents have died and 81 have been infected with coronavirus disease (COVID-19) as the spread of the coronavirus disease (COVID-19) continues in France, March 25, 2020.

Employees of a laboratory work on the production of hydroalcoholic solution according to WHO recommendations for hygienic hand disinfection in Paris, France, March 13, 2020.

Medical staff instal a patient infected with the COVID-19 onboard a TGV high speed train at the Gare d'Austerlitz train station, to evacuate some of the coronavirus disease patients from Paris region hospitals to Brittany, in Paris, France April 1, 2020. Thomas Samson/Pool via REUTERS

A man wearing a protective face mask crosses the deserted Rue de Rivoli in Paris as a lockdown is imposed to slow the rate of the coronavirus disease (COVID-19) in France, March 18, 2020.

A health worker wearing a protective gear takes a break during transfer operations of patients infected with coronavirus disease (COVID-19) from Strasbourg to Germany and Switzerland, France March 30, 2020.

A domestic black cat looks at a cat sitting outside the window, in the village of Blecourt during a lockdown imposed to slow the rate of the coronavirus disease (COVID-19) spread in France, March 29, 2020.

French rescue team wearing protective suits carry a patient on a stretcher from Mulhouse hospital before being loaded into a helicopter as France faces an aggressive progression of the coronavirus disease (COVID-19), March 23, 2020.

A man wearing latex gloves holds his electoral card before voting at a polling station during the first round of mayoral elections in Paris as France grapples with an outbreak of coronavirus disease (COVID-19), March 15, 2020.

A sick patient is secured by firefighters ambulance crew members of the Departmental Fire and Rescue Service (SDIS 67) during a rescue operation in Strasbourg as the spread of the coronavirus disease (COVID-19) continues in France, March 28, 2020.

Medical personnel watch as French President Emmanuel Macron visits the military field hospital outside the Emile Muller Hospital in Mulhouse, eastern France March 25, 2020, during a strict lockdown in France to stop the spread of the coronavirus disease (COVID-19). Cugnot Mathieu/Pool via REUTERS

The message "Merci" in tribute of those on the frontline to fight the coronavirus disease, is seen on the facade of the Eiffel Tower in Paris as the spread of the coronavirus disease (COVID-19) continues in France, March 27, 2020.

A firefighters ambulance crew of the Departmental Fire and Rescue Service (SDIS 67) makes its way to Strasbourg's univerity hospital on the deserted motorway during a rescue operation as the spread of the coronavirus disease (COVID-19) continues in France, March 28, 2020.

An employee prepares a coffin for a coronavirus disease (COVID-19) victim at a funeral logistic center in Ris-Orangis, near Paris, as the spread of the coronavirus disease continues in France, March 31, 2020.

French priest Guillaume Le Floc'h conducts a mass streamed online on the feast of the Annunciation at the church in Carquefou near Nantes as a lockdown is imposed to slow the rate of the coronavirus disease (COVID-19) spread in France, March 25, 2020.