French health workers, wearing protective face masks, hold placards as they attend a demonstration urging the French government to provide more means and better working conditions to hospitals workers and to protest against the lack of money for French public hospitals, in front of the Robert Debre hospital in Paris following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Charles Platiau

French health workers, wearing protective face masks, hold placards as they attend a demonstration urging the French government to provide more means and better working conditions to hospitals workers and to protest against the lack of money for French public hospitals, in front of the Robert Debre hospital in Paris following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Charles Platiau

French health workers, wearing protective face masks, hold placards as they attend a demonstration urging the French government to provide more means and better working conditions to hospitals workers and to protest against the lack of money for French public hospitals, in front of the Robert Debre hospital in Paris following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. The placards read "Segur de la Sante (general talks on health reforms) = a sham" and "there are no magic caregivers". REUTERS/Charles Platiau

French health workers, wearing protective face masks, hold placards as they attend a demonstration urging the French government to provide more means and better working conditions to hospitals workers and to protest against the lack of money for French public hospitals, in front of the Robert Debre hospital in Paris following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Charles Platiau

A French health worker, wearing a protective face mask, attends a demonstration urging the French government to provide more means and better working conditions to hospitals workers and to protest against the lack of money for French public hospitals in front of the Robert Debre hospital in Paris following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Charles Platiau

French health workers, wearing protective face masks, attend a demonstration urging the French government to provide more means and better working conditions to hospitals workers and to protest against the lack of money for French public hospitals in front of the Robert Debre hospital in Paris following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Charles Platiau

Protective masks are displayed above snacks and drinks at a "Safety Station" vending machine of Swiss self-service retailer Selecta at the airport in Zurich, Switzerland May 28, 2020. REUTERS/Arnd Wiegmann

Protective masks are displayed above snacks and drinks at a "Safety Station" vending machine of Swiss self-service retailer Selecta at the airport in Zurich, Switzerland May 28, 2020. REUTERS/Arnd Wiegmann

Protective masks are displayed above snacks and drinks at a "Safety Station" vending machine of Swiss self-service retailer Selecta at the airport in Zurich, Switzerland May 28, 2020. REUTERS/Arnd Wiegmann

French health workers, wearing protective face masks, hold placards as they attend a demonstration in front of the Robert Debre hospital urging the French government to provide more means and better working conditions to hospitals workers and to protest against the lack of money for French public hospitalsin Paris following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Charles Platiau

French health workers, wearing protective face masks, hold placards as they attend a demonstration in front of the Robert Debre hospital urging the French government to provide more means and better working conditions to hospitals workers and to protest against the lack of money for French public hospitalsin Paris following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Charles Platiau

French health workers, wearing protective face masks, hold placards as they attend a demonstration urging the French government to provide more means and better working conditions to hospitals workers and to protest against the lack of money for French public hospitals in Paris following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Charles Platiau

French health workers, wearing protective face masks, hold placards as they attend a demonstration urging the French government to provide more means and better working conditions to hospitals workers and to protest against the lack of money for French public hospitals in Paris following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Charles Platiau

A woman, wearing a protective face mask with the slogan "Macronavirus", attends a demonstration urging the French government to provide more means and better working conditions to health workers and to protest against the lack of money for French public hospitals in front of Robert Debre hospital in Paris following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Charles Platiau

A man wearing a mask walks near Borough Market, following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 28, 2020. REUTERS/Henry Nicholls

A person is seen wearing a mask in Borough Market, following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 28, 2020. REUTERS/Henry Nicholls

A man is seen wearing a mask near London Bridge station, following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 28, 2020. REUTERS/Henry Nicholls

A lady is seen wearing a mask near London Bridge station, following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 28, 2020. REUTERS/Henry Nicholls

A lady wearing a mask walks through Borough Market, following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 28, 2020. REUTERS/Henry Nicholls

A customer, wearing a protective face mask, is reflected in a mirror as she stands on an escalator inside the department store Le Printemps Haussmann in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

Customers, wearing protective face masks, are reflected in a mirror as they stand on an escalator inside the department store Le Printemps Haussmann in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes TPX IMAGES OF THE DAY

Chinese Foreign Minister Wang Yi and Defense Minister Wei Fenghe, wearing face masks following the coronavirus disease (COVID-19) outbreak, talk before the closing session of the National People's Congress (NPC) at the Great Hall of the People in Beijing, China May 28, 2020. REUTERS/Carlos Garcia Rawlins

People wearing protective face masks are seen on a street following an outbreak of the novel coronavirus disease (COVID-19), in Shanghai, China May 28, 2020. REUTERS/Aly Song

People wearing protective face masks are seen at the Yu Garden following an outbreak of the novel coronavirus disease (COVID-19), in Shanghai, China May 28, 2020. REUTERS/Aly Song

People wearing face masks following the coronavirus disease (COVID-19) outbreak walks past a giant screen showing a news conference by Chinese Premier Li Keqiang after the closing session of the National People's Congress (NPC), outside a shopping mall in Beijing, China May 28, 2020. REUTERS/Tingshu Wang

Staff members, wearing protective face masks, stand in front of a Gucci shop inside the department store Le Printemps Haussmann before its reopening in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

An employee, wearing a protective face mask, sprays disinfectant on a shelf with shoes on display inside the department store Le Printemps Haussmann in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

The soldier is seen with a face mask on a first world war memorial in Fenton, following the outbreak of the coronavirus disease (COVID-19), Fenton, Stoke-on-Trent, Britain, May 28, 2020. REUTERS/Carl Recine

The soldier is seen with a face mask on a first world war memorial in Fenton, following the outbreak of the coronavirus disease (COVID-19), Fenton, Stoke-on-Trent, Britain, May 28, 2020. REUTERS/Carl Recine

Staff members, wearing protective face masks, stand at the reception desk inside the department store Le Printemps Haussmann in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

Customers, wearing protective face masks, look at their mobile phone as they line up in front of shops inside the department store Le Printemps Haussmann in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

Customers, wearing protective face masks, stand in front of a Louis Vuitton shop inside the department store Le Printemps Haussmann in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

A security member and customers, wearing protective face masks, use escalators inside the department store Le Printemps Haussmann in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

A man wearing a face mask following the coronavirus disease (COVID-19) outbreak walks past a television showing a news conference by Chinese Premier Li Keqiang after the closing session of the National People's Congress (NPC), at a subway station in Beijing, China May 28, 2020. REUTERS/Tingshu Wang

A woman wearing a face mask following the coronavirus disease (COVID-19) outbreak stands in front of a television showing a news conference by Chinese Premier Li Keqiang after the closing session of the National People's Congress (NPC), inside a vegetables store in Beijing, China May 28, 2020. REUTERS/Tingshu Wang

A man wearing a face mask following the coronavirus disease (COVID-19) outbreak stands near a television showing a news conference by Chinese Premier Li Keqiang after the closing session of the National People's Congress (NPC), inside a vegetables store in Beijing, China May 28, 2020. REUTERS/Tingshu Wang

Security personnel wearing face masks following the coronavirus disease (COVID-19) outbreak march outside the Great Hall of the People before the closing session of the National People's Congress (NPC) in Beijing, China May 28, 2020. REUTERS/Carlos Garcia Rawlins

Staff members, wearing protective face masks, stand in front of a Gucci shop inside the department store Le Printemps Haussmann before its reopening in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

Staff members, wearing protective face masks, stand in front of a Gucci shop inside the department store Le Printemps Haussmann before its reopening in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

People wearing face masks following the coronavirus disease (COVID-19) outbreak travel near a screen showing a news conference by Chinese Premier Li Keqiang after the closing session of the National People's Congress (NPC), in Beijing, China May 28, 2020. REUTERS/Thomas Peter

Customers, wearing protective face masks, maintain social distancing as they line up in front of a Louis Vuitton shop inside the department store Le Printemps Haussmann in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

A passenger wearing a protective face mask waits for the security check at Fiumicino Airport, where new security measures have been implemented ahead of a further loosening of movement restrictions on June 3, when Italy is due to reopen its borders to travellers from Europe to unwind its rigid lockdown due to the coronavirus disease (COVID-19), in Rome, Italy, May 28, 2020. REUTERS/Guglielmo Mangiapane

A passenger wearing a protective face mask walks at Fiumicino Airport, where new security measures have been implemented ahead of a further loosening of movement restrictions on June 3, when Italy is due to reopen its borders to travellers from Europe to unwind its rigid lockdown due to the coronavirus disease (COVID-19), in Rome, Italy, May 28, 2020. REUTERS/Guglielmo Mangiapane

People wearing face masks following the coronavirus disease (COVID-19) outbreak ride a subway where a television shows a news conference by Chinese Premier Li Keqiang after the closing session of the National People's Congress (NPC), in Beijing, China May 28, 2020. REUTERS/Tingshu Wang

A customer, wearing a protective face mask, stands in front of a Louis Vuitton shop inside the department store Le Printemps Haussmann in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

A man wearing a face mask following the coronavirus disease (COVID-19) outbreak stands inside a train near a television showing a news conference by Chinese Premier Li Keqiang after the closing session of the National People's Congress (NPC), at a subway station in Beijing, China May 28, 2020. REUTERS/Tingshu Wang

Customers, wearing protective face masks, stand in front of a Louis Vuitton shop inside the department store Le Printemps Haussmann in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

An airport security member wearing a protective face mask stands at the Fiumicino airport, where new security measures have been implemented ahead of a further loosening of movement restrictions on June 3 when Italy is due to reopen its borders to travellers from Europe to unwind its rigid lockdown due to the coronavirus disease (COVID-19), in Rome, Italy May 28, 2020. REUTERS/Guglielmo Mangiapane

A passenger wearing a protective face mask walks at Fiumicino Airport, where new security measures have been implemented ahead of a further loosening of movement restrictions on June 3, when Italy is due to reopen its borders to travellers from Europe to unwind its rigid lockdown due to the coronavirus disease (COVID-19), in Rome, Italy, May 28, 2020. REUTERS/Guglielmo Mangiapane

Customers, wearing protective face masks, queue in line in front of a Louis Vuitton shop inside the department store Le Printemps Haussmann in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

People wearing face masks following the coronavirus disease (COVID-19) outbreak cross a road near a screen showing a news conference by Chinese Premier Li Keqiang after the closing session of the National People's Congress (NPC), in Beijing, China May 28, 2020. REUTERS/Thomas Peter

An airport security member wearing a protective face mask stands near a sign indicating to keep the social distancing at Fiumicino Airport, where new security measures have been implemented ahead of a further loosening of movement restrictions on June 3, when Italy is due to reopen its borders to travellers from Europe to unwind its rigid lockdown due to the coronavirus disease (COVID-19), in Rome, Italy, May 28, 2020. REUTERS/Guglielmo Mangiapane

Customers, wearing protective face masks, queue in line in front of a Louis Vuitton shop inside the department store Le Printemps Haussmann in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

People, wearing protective face masks, clean their hands with disinfectant before entering inside the department store Le Printemps Haussmann in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

A passenger wearing a protective face mask passes near a sign indicating to keep the social distancing at Fiumicino Airport, where new security measures have been implemented ahead of a further loosening of movement restrictions on June 3, when Italy is due to reopen its borders to travellers from Europe to unwind its rigid lockdown due to the coronavirus disease (COVID-19), in Rome, Italy, May 28, 2020. REUTERS/Guglielmo Mangiapane

Staff members, wearing protective face masks, stand in front of a Gucci shop inside the department store Le Printemps Haussmann before its reopening in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

Clients, wearing protective face masks, queue in line in front of a Louis Vuitton shop inside the department store Le Printemps Haussmann in Paris as France eases gradually its lockdown measures and restrictions following the outbreak of the coronavirus disease (COVID-19) in France, May 28, 2020. REUTERS/Gonzalo Fuentes

Shoppers wearing protective face masks shop at a supermarket, amid the coronavirus disease (COVID-19) outbreak in Kuala Lumpur, Malaysia May 28, 2020. REUTERS/ Lim Huey Teng

Shoppers wearing protective face masks shop at a supermarket, amid the coronavirus disease (COVID-19) outbreak in Kuala Lumpur, Malaysia May 28, 2020. REUTERS/ Lim Huey Teng

A man wearing a protective mask walks past closed shops, amid the coronavirus disease (COVID-19) outbreak in Kuala Lumpur, Malaysia May 28, 2020. REUTERS/ Lim Huey Teng