A staff member sprays disinfectant in a restaurant in Rome, Italy, April 22, 2020. (Photo by Elisa Lingria/Xinhua)

A staff member puts on protective gear before doing the cleaning work at a hospital in Barcelona, Spain, April 20, 2020. (Photo by Francisco Avia/Xinhua)

French Civil Protection volunteers inquire the condition of a suspected patient of COVID-19 at an accommodation establishment for dependent elderly people (called "Ehpad" in French), in Epinay sur Seine near Paris, France, April 22, 2020. (Photo by Aurelien Morissard/Xinhua)

A staff member (R) offers a face mask to a woman in front of the City Hall of Dresden, Saxony state, eastern Germany, on April 20, 2020. (Photo by Kevin Voigt/Xinhua)

A volunteer works at a food distribution hub for vulnerable groups, in London, Britain on April 21, 2020. (Photo by Tim Ireland/Xinhua)

Canal cruise ships stop by the shore in Amsterdam, the Netherlands, April 23, 2020. (Photo by Sylvia Lederer/Xinhua)

A worker conducts disinfection as a measure to curb the spread of COVID-19 in Bucharest, Romania on April 6, 2020. (Photo by Gabriel Petrescu/Xinhua)

Military personnel are on duty on a highway in Hyvinkaa, Uusimaa, Finland, on March 28, 2020. (Photo by Matti Matikainen/Xinhua)