A view shows the Champs Elysees avenue in Paris as a lockdown is imposed to slow the rate of the coronavirus disease (COVID-19) in France, March 20, 2020. French President Emmanuel Macron has ordered stringent restrictions on people's movement to slow the spread of the coronavirus. REUTERS/Gonzalo Fuentes

A view shows the empty Iena Bridge near the Eiffel tower as a lockdown is imposed to slow the rate of the coronavirus disease (COVID-19) in Paris, in France March 18, 2020. Several hours before the lockdown came into force, fewer vehicles and people were seen along the iconic Champs Elysees. REUTERS/Gonzalo Fuentes

A view shows the deserted Pont de la Concorde bridge with the National Assembly in Paris as a lockdown is imposed to slow the spreading of the coronavirus disease (COVID-19) in France, March 18, 2020. REUTERS/Gonzalo Fuentes

A view shows the deserted Pont des Arts bridge in Paris as a lockdown is imposed to slow the rate of the coronavirus disease (COVID-19) in France, March 18, 2020. REUTERS/Christian Hartmann

A view shows the deserted business district of La Defense as lockdown is imposed to slow the spreading of the coronavirus disease (COVID-19) in Paris, France, March 18, 2020. REUTERS/Benoit Tessier

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. REUTERS/Christian Hartmann