Cleaners receive training at the Pousada Castelo Hotel during the coronavirus disease (COVID-19) outbreak, in Alcacer do Sal, Portugal June 3, 2020. Picture taken June 3, 2020. REUTERS/Rafael Marchante

A cleaner works at the entrance of Pousada Castelo Hotel during the coronavirus disease (COVID-19) outbreak, in Alcacer do Sal, Portugal June 3, 2020. Picture taken June 3, 2020. REUTERS/Rafael Marchante

A community member uses spray cleaner to wipe off graffiti the morning after a protest and rally against the death in Minneapolis police custody of George Floyd, in downtown Seattle, Washington, U.S. May 31, 2020. REUTERS/Lindsey Wasson

A cleaner wearing a protective face mask and gloves cleans the movies screen board at Mall of the Emirates during the reopening of malls, following the outbreak of the coronavirus disease (COVID-19), in Dubai, United Arab Emirates, May 28, 2020. REUTERS/Ahmed Jadallah

A cleaner wearing a protective face mask and gloves cleans the shelves inside a shop during the reopening of malls, following the outbreak of the coronavirus disease (COVID-19), at Mall of the Emirates in Dubai, United Arab Emirates, May 28, 2020. REUTERS/Ahmed Jadallah

Surface cleaner is seen at Grove Road Primary School, following the outbreak of the coronavirus disease (COVID-19), Tring, Britain, May 28, 2020. REUTERS/Eddie Keogh

As the national death toll from the coronavirus disease (COVID-19) nears 100,000, a park cleaner picks up a discarded face mask in front of the Lincoln Memorial in Washington, U.S., May 27, 2020. REUTERS/Kevin Lamarque

Cleaners pack cleaning supplies into their truck at Orchard Villa Retirement Residence, where several residents died of the coronavirus disease (COVID-19), in Pickering, Ontario, Canada May 26, 2020. REUTERS/Carlos Osorio TPX IMAGES OF THE DAY

A street cleaner walks through the closed Broadway theatre district near Times Square following the outbreak of the coronavirus disease (COVID-19) in Manhattan, New York City, U.S., May 24, 2020. REUTERS/Andrew Kelly TPX IMAGES OF THE DAY

Street cleaners talk as a woman has her wedding picture taken near the Forbidden City on the opening day of the National People's Congress (NPC) following the outbreak of the coronavirus disease (COVID-19), in Beijing, China May 22, 2020. REUTERS/Thomas Peter TPX IMAGES OF THE DAY

A cleaner wipes the floor of a classroom at Ikastola Axular school, as schools in Spain's Basque region prepare to receive students next week, amid the coronavirus disease (COVID-19) outbreak, in San Sebastian, Spain, May 21, 2020. REUTERS/Vincent West

A cleaner wipes a table in a classroom at Ikastola Axular school, as schools in Spain's Basque region prepare to receive students next week, amid the coronavirus disease (COVID-19) outbreak, in San Sebastian, Spain, May 21, 2020. REUTERS/Vincent West

A cleaner wipes a table in a classroom at Ikastola Axular school, as schools in Spain's Basque region prepare to receive students next week, amid the coronavirus disease (COVID-19) outbreak, in San Sebastian, Spain, May 21, 2020. REUTERS/Vincent West

An airport cleaner wears protective face mask as the coronavirus disease (COVID-19) continues, at Hartsfield–Jackson Atlanta International Airport in Atlanta, Georgia, U.S., May 19, 2020. Picture taken May 19, 2020. REUTERS/Shannon Stapleton

A street cleaner in a face mask walks past a Huawei shop, amid an outbreak of the coronavirus disease (COVID-19), in Beijing, China, May 18, 2020. REUTERS/Thomas Peter REFILE - CORRECTING ID

A cleaner wearing a face mask walks past an exhibition with lantern decorations at the National Museum in Beijing, following the novel coronavirus disease (COVID-19) outbreak, China May 16, 2020. REUTERS/Tingshu Wang

Window cleaners work as the International airport presents additional COVID-19 safety measures, amid the coronavirus disease outbreak in Frankfurt, Germany, May 12, 2020. REUTERS/Ralph Orlowski

A window cleaner is seen at work in London following the outbreak of the coronavirus disease (COVID-19), London, Britain May 11, 2020. REUTERS/Simon Dawson

A street cleaner wearing a face mask sanitizes benches at Wangfujing street, following an outbreak of the coronavirus disease (COVID-19), in Beijing, China May 7, 2020. REUTERS/Carlos Garcia Rawlins

A street cleaner wearing a face mask sanitizes a trash can at Wangfujing street, following an outbreak of the coronavirus disease (COVID-19), in Beijing, China May 7, 2020. REUTERS/Carlos Garcia Rawlins

A cleaner walks on the platform near rows of stationary trains as the MTA Subway closed overnight for cleaning and disinfecting during the outbreak of the coronavirus disease (COVID-19) in the Brooklyn borough of New York City, U.S., May 7, 2020. REUTERS/Andrew Kelly

A street cleaner sweeps outside Downing Street, following the outbreak of the coronavirus disease (COVID-19), in London, Britain, May 4, 2020. REUTERS/John Sibley

A cleaner sterilises handrails at a mall as Malaysia reopens a majority of businesses, after a movement control order was imposed to fight the outbreak of the coronavirus disease (COVID-19), in Kuala Lumpur, Malaysia May 4, 2020. REUTERS/Lim Huey Teng

Suchada Mesuwan, an employee of A-1 Cleaners dry cleaning shop wears a mask as restaurants and stores are reopened following the lifting of some restrictions in place to prevent the spread of the coronavirus disease (COVID-19) in Houston, Texas, U.S., May 1, 2020. REUTERS/Go Nakamura

Spray bottles of disinfectant are seen in A-1 Cleaners dry cleaning shop as restaurants and stores are reopened following the lifting of some restrictions in place to prevent the spread of the coronavirus disease (COVID-19) in Houston, Texas, U.S., May 1, 2020. REUTERS/Go Nakamura

Suchada Mesuwan, an employee of A-1 Cleaners dry cleaning shop wears a mask as restaurants and stores are reopened following the lifting of some restrictions in place to prevent the spread of the coronavirus disease (COVID-19) in Houston, Texas, U.S., May 1, 2020. REUTERS/Go Nakamura

A cleaner wearing a protective gear sanitises a room of the Hotel Atlante Star Roma, a four-star hotel close to the Vatican, as Italy prepares for a gradual easing of lockdown restrictions that have been imposed to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy, April 29, 2020. REUTERS/Alberto Lingria

A cleaner wearing a protective gear sanitises the Hotel Atlante Star Roma, a four-star hotel close to the Vatican, as Italy prepares for a gradual easing of lockdown restrictions that have been imposed to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy, April 29, 2020. REUTERS/Alberto Lingria

A cleaner wearing a protective gear sanitises the entrance of the Hotel Atlante Star Roma, a four-star hotel close to the Vatican, as Italy prepares for a gradual easing of lockdown restrictions that have been imposed to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy, April 29, 2020. REUTERS/Alberto Lingria

A cleaner wearing a protective gear sanitises the Hotel Atlante Star Roma, a four-star hotel close to the Vatican, as Italy prepares for a gradual easing of lockdown restrictions that have been imposed to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy, April 29, 2020. REUTERS/Alberto Lingria

A cleaner wearing a protective gear sanitises the terrace of Hotel Atlante Star Roma, a four-star hotel close to the Vatican, as Italy prepares for a gradual easing of lockdown restrictions that have been imposed to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy, April 29, 2020. REUTERS/Alberto Lingria

A cleaner wearing a protective gear sanitises the terrace of Hotel Atlante Star Roma, a four-star hotel close to the Vatican, as Italy prepares for a gradual easing of lockdown restrictions that have been imposed to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy, April 29, 2020. REUTERS/Alberto Lingria

A cleaner wearing a protective gear sanitises the sign of ''Les Etoiles'', the restaurant of Hotel Atlante Star Roma, a four-star hotel close to the Vatican, as Italy prepares for a gradual easing of lockdown restrictions that have been imposed to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy, April 29, 2020. REUTERS/Alberto Lingria

A cleaner wearing a protective gear sanitises the entrance of the Hotel Atlante Star Roma, a four-star hotel close to the Vatican, as Italy prepares for a gradual easing of lockdown restrictions that have been imposed to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy, April 29, 2020. REUTERS/Alberto Lingria

A cleaner wearing a protective gear sanitises the entrance of the Hotel Atlante Star Roma, a four-star hotel close to the Vatican, as Italy prepares for a gradual easing of lockdown restrictions that have been imposed to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy, April 29, 2020. REUTERS/Alberto Lingria

A cleaner wearing a protective gear sanitises a room of the Hotel Atlante Star Roma, a four-star hotel close to the Vatican, as Italy prepares for a gradual easing of lockdown restrictions that have been imposed to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy, April 29, 2020. REUTERS/Alberto Lingria

A cleaner wearing a protective gear sanitises the Hotel Atlante Star Roma, a four-star hotel close to the Vatican, as Italy prepares for a gradual easing of lockdown restrictions that have been imposed to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy, April 29, 2020. REUTERS/Alberto Lingria

A cleaner wearing a protective gear sanitises a room of the Hotel Atlante Star Roma, a four-star hotel close to the Vatican, as Italy prepares for a gradual easing of lockdown restrictions that have been imposed to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy, April 29, 2020. REUTERS/Alberto Lingria

Cleaners wearing protective gears sanitise a room of the Hotel Atlante Star Roma, a four-star hotel close to the Vatican, as Italy prepares for a gradual easing of lockdown restrictions that have been imposed to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy, April 29, 2020. REUTERS/Alberto Lingria

A cleaner wearing a protective gear sanitises the Hotel Atlante Star Roma, a four-star hotel close to the Vatican, as Italy prepares for a gradual easing of lockdown restrictions that have been imposed to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy, April 29, 2020. REUTERS/Alberto Lingria TPX IMAGES OF THE DAY

The light trails of a street cleaner pass through a quiet Soho during the late evening, as the city at night is deserted like never before while the coronavirus disease (COVID-19) lockdown continues, in London, Britain April 21, 2020. Picture taken April 21, 2020. Picture taken with a slow shutter speed. REUTERS/Dylan Martinez u000d

A cleaner is seen during a lockdown to prevent the outbreak of coronavirus disease (COVID-19) in Dubai, United Arab Emirates April 22, 2020. REUTERS/Ahmed Jadallah

A cleaner wearing a protective face mask, following the outbreak of the coronavirus disease (COVID-19), walks away after cleaning an airplane that arrived on the tarmac at Kuwait Airport, Kuwait April 21, 2020. REUTERS/Stephanie McGehee

Adelia Aquino, a cleaner who has been tasked with cleaning rooms of COVID-19 patients, poses for a portrait at the Swedish Medical Center First Hill campus during the coronavirus disease (COVID-19) outbreak, in Seattle, Washington, U.S. April 20, 2020. "First, I got nervous but because every day my supervisor gave us a meeting, everything feels okay as long as I use my proper PPE I know I will be safe," she says. REUTERS/David Ryder

CORRECTION Correction corrects disputed areas borders. Graphics shows air quality improvement in northern India after the COVID-19 lockdown. Levels of PM2.5 and PM2.5 Nitrate in the atmosphere

A street cleaner walks in the Qianmen district, one of the top tourist destinations in Beijing, as the spread of the novel coronavirus disease (COVID-19) continues in China April 8, 2020. Picture taken April 8, 2020. REUTERS/Thomas Peter

A street cleaner works at Beijing's Central Business District during morning rush hour as the spread of the new coronavirus disease (COVID-19) continues in China, April 17, 2020, REUTERS/Thomas Peter

A street cleaner walks by Beijing's Central Business District during morning rush hour as the spread of the new coronavirus disease (COVID-19) continues in China, April 17, 2020, REUTERS/Thomas Peter

A man wearing a protective mask walks on a closed street market as a cleaner disinfect it, during the coronavirus disease (COVID-19) outbreak, at the Rocinha slum in Rio de Janeiro, Brazil April 10, 2020. REUTERS/Ricardo Moraes

A cleaner disinfects the street of Rocinha slum during the coronavirus disease (COVID-19) outbreak, in Rio de Janeiro, Brazil April 10, 2020. REUTERS/Ricardo Moraes

Cleaners disinfect the streets of Rocinha slum during the coronavirus disease (COVID-19) outbreak, in Rio de Janeiro, Brazil April 10, 2020. REUTERS/Ricardo Moraes

Cleaners disinfect the streets of Rocinha slum during the coronavirus disease (COVID-19) outbreak, in Rio de Janeiro, Brazil April 10, 2020. REUTERS/Ricardo Moraes

A cleaner disinfects the street of Rocinha slum during the coronavirus disease (COVID-19) outbreak, in Rio de Janeiro, Brazil April 10, 2020. REUTERS/Ricardo Moraes

A woman and a kid wearing protective masks walk at a closed street market as cleaners disinfect it, during the coronavirus disease (COVID-19) outbreak, at the Rocinha slum in Rio de Janeiro, Brazil April 10, 2020. REUTERS/Ricardo Moraes

A man wearing a protective mask walks on a street disinfected by cleaners during the coronavirus disease (COVID-19) outbreak, at the Rocinha slum in Rio de Janeiro, Brazil April 10, 2020. REUTERS/Ricardo Moraes TPX IMAGES OF THE DAY

A street cleaner in Belfast, as the spread of the coronavirus disease (COVID-19) continues, in Belfast, Northern Ireland, April 10, 2020. REUTERS/Jason Cairnduff

A municipal cleaner walks past an empty street as people play drums and a bugle from their balconies after the Way to the Calvary procession, known as the Turbas (mobs), was cancelled due to the coronavirus disease (COVID-19) outbreak, in Cuenca, Spain, April 10, 2020. REUTERS/Susana Vera

A cleaner wipes a social-distancing chair after it was used by staff of food delivery companies during the coronavirus disease (COVID-19) outbreak at a shopping mall in Bangkok, Thailand, April 10, 2020. REUTERS/Athit Perawongmetha

Street cleaners wearing face masks pays tribute during China's national mourning for those who died of the coronavirus disease (COVID-19), on the Qingming tomb-sweeping festival, in Beijing April 4, 2020. REUTERS/Thomas Peter

A Downtown Alliance street cleaner works on a nearly deserted Nassau Street in the financial district in lower Manhattan during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., April 3, 2020. REUTERS/Mike Segar