A worker sprays disinfectant in the Ceilandia metro station, amid coronavirus disease (COVID-19) outbreak, in Brasilia, Brazil April 7, 2020. REUTERS/Ueslei Marcelino 

A Palestinian worker sanitizes vegetables ordered by customers before they are packed and delivered to their homes amid concerns about the spread of the coronavirus disease (COVID-19), in a delivery company in the central Gaza Strip April 5, 2020. Picture taken April 5, 2020. REUTERS/Ibraheem Abu Mustafa 

A specialist wearing protective gear sprays disinfectant while sanitizing a playground to prevent the spread of the coronavirus disease (COVID-19) in the town of Vsevolozhsk in Leningrad Region, Russia April 5, 2020. REUTERS/Anton Vaganov 

A volunteer sprays disinfectant in the Baitul Mukarram National Mosque before Friday prayer amid concerns over the coronavirus disease (COVID-19) outbreak in Dhaka, Bangladesh, April 3, 2020. REUTERS/Mohammad Ponir Hossain 

A worker disinfects a bus stop during the outbreak of the coronavirus disease (COVID-19), in Curitiba, Brazil, April 2, 2020. REUTERS/Rodolfo Buhrer TPX IMAGES OF THE DAY 

A member of local hygiene services wears a protective suit and face masks, disinfects an empty mosque to stop the spread of coronavirus disease (COVID-19) in Dakar, Senegal April 1, 2020. REUTERS/Zohra Bensemra 

A member of local hygiene services wears a protective suit and face masks, as he disinfects a Dara, or Koranic school, to stop the spread of the coronavirus disease (COVID-19) in Dakar, Senegal April 1, 2020. REUTERS/Zohra Bensemra 

Fire service men are seen fumigating at a government building on the second day of a 14-day lockdown aimed at limiting the spread of coronavirus disease (COVID-19), in Abuja, Nigeria April 1, 2020.REUTERS/Afolabi Sotunde 

A man disinfects his hands before buying a low-priced food from a charity stall, during a lockdown after Pakistan shut all markets, public places and discouraged large gatherings amid an outbreak of coronavirus disease (COVID-19), in Karachi, Pakistan, April 1, 2020. REUTERS/Akhtar Soomro 

A worker wearing protective garments sanitises the Duomo square, during the coronavirus disease (COVID-19) outbreak in central Milan, Italy March 31, 2020. REUTERS/Flavio Lo Scalzo 

A worker sprays disinfectant in the medieval centre of Castiglione della Pescaia, as the spread of coronavirus disease (COVID-19) continues, in Grosseto, Italy March 31, 2020. REUTERS/Jennifer Lorenzini 

A worker sprays disinfectant in the medieval centre of Castiglione della Pescaia, as the spread of coronavirus disease (COVID-19) continues, in Grosseto, Italy March 31, 2020. REUTERS/Jennifer Lorenzini 

A worker sprays disinfectant in the medieval centre of Castiglione della Pescaia, as the spread of coronavirus disease (COVID-19) continues, in Grosseto, Italy March 31, 2020. REUTERS/Jennifer Lorenzini TPX IMAGES OF THE DAY 

A worker sprays disinfectant over buildings in the medieval centre of Castiglione della Pescaia, as the spread of coronavirus disease (COVID-19) continues, in Grosseto, Italy March 31, 2020. REUTERS/Jennifer Lorenzini 

A worker sprays disinfectant over buildings in the medieval centre of Castiglione della Pescaia, as the spread of coronavirus disease (COVID-19) continues, in Grosseto, Italy March 31, 2020. REUTERS/Jennifer Lorenzini 

Members of a local hygiene service wear protective suits and face masks as they disinfect the streets to stop the spread of coronavirus disease (COVID-19) in Abidjan, Ivory Coast, March 30, 2020. REUTERS/Thierry Gouegnon 

A worker uses an iron on preventive cloth masks at a sewing workshop, following the outbreak of coronavirus disease (COVID-19) in Concepcion, Chile March 30, 2020. REUTERS/Jose Luis Saavedra 

A member of local hygiene services holds his gloves as his colleagues clean area around closed market amid concerns over the spread of coronavirus disease (COVID-19), in Dakar, Senegal March 30,2020.REUTERS/Zohra Bensemra 

A funeral service worker looks at coffins of two victims of coronavirus disease (COVID-19) during a burial ceremony in the southern town of Cisternino, Italy March 30, 2020. REUTERS/Alessandro Garofalo TPX IMAGES OF THE DAY 

A person walks through a disinfection chamber installed on a sidewalk as part of the measures against the spreading of the coronavirus disease (COVID-19), in Escobedo, on the outskirts of Monterrey, Mexico March 29, 2020. REUTERS/Daniel Becerril 

People walk through a disinfection chamber installed on a sidewalk as part of the measures against the spreading of the coronavirus disease (COVID-19), in Escobedo, on the outskirts of Monterrey, Mexico March 29, 2020. REUTERS/Daniel Becerril 

A member of local hygiene services wearing protective suit and face mask, disinfects a market due the outbreak of coronavirus disease (COVID-19), in Abidjan, Ivory Coast March 29, 2020. REUTERS/Luc Gnago 

A member of local hygiene services wearing protective suit and face mask, disinfects a market due the outbreak of coronavirus disease (COVID-19), in Abidjan, Ivory Coast March 29, 2020. REUTERS/Luc Gnago 

A Palestinian worker irons protective face masks to be exported and sold in the local market, amid concerns over the spread of the coronavirus disease (COVID-19), in a factory east of Gaza City March 29, 2020. REUTERS/Mohammed Salem 

Municipal worker disinfects streets at downtown Cascais, to stop the spread of coronavirus disease (COVID-19) in Cascais, Portugal March 28, 2020. REUTERS/Rafael Marchante 

Municipal worker disinfects streets at downtown Cascais, to stop the spread of coronavirus disease (COVID-19) in Cascais, Portugal March 28, 2020. REUTERS/Rafael Marchante 

Municipal workers disinfect streets at downtown Cascais, to stop the spread of coronavirus disease (COVID-19) in Cascais, Portugal March 28, 2020. REUTERS/Rafael Marchante 

A photographer sprays alcohol to sanitise his hands while working, as Egypt ramps up its efforts to slow down the spread of the coronavirus disease (COVID-19), in Cairo, Egypt March 25, 2020. Picture taken March 25, 2020. REUTERS/Mohamed Abd El Ghany 

A homeless person waits to collect hygiene supplies at a Belgian Red Cross centre during the coronavirus lockdown imposed by the Belgian government in an attempt to slow down the coronavirus disease (COVID-19), in Brussels, Belgium March 25, 2020. REUTERS/Yves Herman 

A person disinfects hands at a Belgian distillery that switches its production from gin to disinfecting alcohol during the coronavirus lockdown, imposed by the Belgian government in an attempt to slow down the spread of COVID-19, in Wichelen, Belgium, March 20, 2020. REUTERS/Francois Lenoir 

A person disinfects hands at a Belgian distillery that switches its production from gin to disinfecting alcohol during the coronavirus lockdown, imposed by the Belgian government in an attempt to slow down the spread of COVID-19, in Wichelen, Belgium, March 20, 2020. REUTERS/Francois Lenoir 

A health worker sprays disinfectant commuters hands as the city steps up efforts to combat the spread of coronavirus disease (COVID-19) at a bus depot in Cape Town, South Africa, March 18, 2020. REUTERS/Mike Hutchings 

A worker wearing a protective suit disinfects a bus station, following the outbreak of coronavirus disease (COVID-19), in Algiers, Algeria March 16, 2020. REUTERS/Ramzi Boudina TPX IMAGES OF THE DAY 

Workers disinfect a school following new cases of coronavirus in the city, in San Juan, Metro Manila, Philippines, March 9, 2020. REUTERS/Eloisa Lopez 

Eucharistic ministers use hand sanitizer before Communion as a sanitary precaution at Our Lady of Lourdes Catholic church in Atlanta, Georgia, U.S. March 8, 2020. REUTERS/Christopher Aluka Berry 

A staff member at city transport company wearing protective clothing disinfects a bus as new coronavirus disease (COVID-19) cases are reported in Skopje, North Macedonia March 7, 2020.REUTERS/Ognen Teofilovski 

A staff member at city transport company wearing protective clothing disinfects a bus as new coronavirus disease (COVID-19) cases are reported in Skopje, North Macedonia March 7, 2020.REUTERS/Ognen Teofilovski 

A member of Civil defense wears a protective face mask, following the coronavirus outbreak, as he disinfects and sterilizes the explosive control headquarters in Kerbala, Iraq, March 6, 2020. REUTERS/Abdullah Dhiaa al-Deen 

A worker wearing a protective suit arrives to disinfect the Church of the Nativity as a preventive measure against the coronavirus, in Bethlehem in the Israeli-occupied West Bank March 5, 2020. REUTERS/Mussa Qawasma 

An employee wearing protective gear sprays disinfectant to sanitize a passenger bus over coronavirus fears in Tbilisi, Georgia March 2, 2020. REUTERS/Irakli Gedenidze 

A nurse wearing rubber gloves folds her hands at a checkpoint at the Jiujiang Yangtze River Bridge in Jiujiang, Jiangxi province, China, as the country is hit by an outbreak of a new coronavirus, February 1, 2020. REUTERS/Thomas Peter 

A staff member sanitizes the floor at an entrance of a residential complex, as the country is hit by an outbreak of the new coronavirus, in Beijing, China February 1, 2020. REUTERS/Carlos Garcia Rawlins 

A staff member sanitize the floor at an entrance of a residential complex, as the country is hit by an outbreak of the new coronavirus, in Beijing, China February 1, 2020. REUTERS/Carlos Garcia Rawlins 

A woman wearing a face mask walks along a street, as the country is hit by an outbreak of the new coronavirus, in Beijing, China February 1, 2020. REUTERS/Carlos Garcia Rawlins 

A child wearing a face mask plays at the Beihai Park, as the country is hit by an outbreak of the new coronavirus, in Beijing, China January 31, 2020. REUTERS/Tingshu Wang 

A woman wearing a face mask and goggles uses an escalator near Beijing Railway Station as the country is hit by an outbreak of the new coronavirus, in Beijing, China January 30, 2020. REUTERS/Carlos Garcia Rawlins 

A woman wearing a face mask rides a bicycle as the country is hit by an outbreak of the new coronavirus, in Beijing, China January 30, 2020. REUTERS/Carlos Garcia Rawlins 

Test tube with Corona virus name label is seen in this illustration taken on January 29, 2020. REUTERS/Dado Ruvic 

Test tube with Corona virus name label is seen in this illustration taken on January 29, 2020. REUTERS/Dado Ruvic 

Test tube with Corona virus name label is seen in this illustration taken on January 29, 2020. REUTERS/Dado Ruvic 

Test tube with Corona virus name label is seen in this illustration taken on January 29, 2020. REUTERS/Dado Ruvic 

A worker in protective suit holds a thermometer while standing at the entrance of the Xizhimen subway station, as the country is hit by an outbreak of the new coronavirus, in Beijing, China January 27, 2020. REUTERS/Carlos Garcia Rawlins 

Elephants walk through the Maasai Mara National Reserve, Kenya, October 14, 2019. Picture taken October 14, 2019. REUTERS/Baz Ratner 

A child holds a newly-hatched baby sea turtle born at a protective nesting site set-up as part of the Israeli Sea Turtle Rescue Center's conservation programme, at a beach near Mikhmoret north of Tel Aviv, Israel September 9, 2019. Picture taken September 9, 2019. REUTERS/Amir Cohen TPX IMAGES OF THE DAY 

Meat products are pictured in an EDEKA supermarket in Berlin, Germany, August 9, 2019. REUTERS/Fabrizio Bensch 

Meat products are pictured in an EDEKA supermarket in Berlin, Germany, August 9, 2019. REUTERS/Fabrizio Bensch 

A newly born cygnet falls in front of its pen, by the female swan, early morning at Bains des Paquis in Geneva, Switzerland May 27, 2019. REUTERS/Denis Balibouse 

A newly born cygnet falls in front of its pen, by the female swan, early morning at Bains des Paquis in Geneva, Switzerland May 27, 2019. REUTERS/Denis Balibouse 

Gorilla mother Mayani holds her baby Thandie in their enclosure at Antwerp's zoo, Belgium, March 28, 2019. REUTERS/Francois Lenoir 

A newly born albino red-necked wallaby joey is carried by its mother in their enclosure at the zoo in Decin, Czech Republic, March 13, 2019. REUTERS/David W Cerny