A cleaner photographs an Ultrasonic Disinfection Atomiser cleaning robot, known as an Eco Bot 50 as it cleans St Pancras International station, amid the coronavirus disease (COVID-19) outbreak in London, Britain, September 23, 2020. REUTERS/Hannah McKay

Cleaners wearing protective suits spray disinfectant at a Sauna and Spa centre to prepare the reopening, following the coronavirus disease (COVID-19) outbreak, in Hong Kong, China September 16, 2020. Picture taken 16, 2020. REUTERS/Tyrone Siu

A cleaner wearing a protective suit sprays disinfectant at a Sauna and Spa centre to prepare the reopening, following the coronavirus disease (COVID-19) outbreak, in Hong Kong, China September 16, 2020. Picture taken 16, 2020. REUTERS/Tyrone Siu

Cleaners wearing protective suits spray disinfectant at a Sauna and Spa centre to prepare the reopening, following the coronavirus disease (COVID-19) outbreak, in Hong Kong, China September 16, 2020. Picture taken 16, 2020. REUTERS/Tyrone Siu

A cleaner wearing a protective suit sprays disinfectant at a Sauna & Spa centre to prepare the reopening, following the coronavirus disease (COVID-19) outbreak, in Hong Kong, China September 16, 2020. Picture taken 16, 2020. REUTERS/Tyrone Siu

A cleaner walks past screens promoting Disney's movie "Mulan" as the film opens in China, at a cinema in Beijing, China September 11, 2020. REUTERS/Florence Lo

A cleaner walks past screens promoting Disney's movie "Mulan" as the film opens in China, at a cinema in Beijing, China September 11, 2020. REUTERS/Florence Lo

Bottles of surface cleaner disinfectant await use by members at Chelsea Piers Fitness, Manhattan's largest fitness facility on the first day of the re-opening of gyms in New York City following the outbreak of the coronavirus disease (COVID-19) in New York, U.S., September 2, 2020. REUTERS/Mike Segar

A worker wearing a protective suit collects garbage from hospitals of patients infected with coronavirus disease (COVID-19), to be burnt, in the holy city of Najaf, Iraq, August 27, 2020. Picture taken August 27, 2020. REUTERS/Alaa Al-Marjani

A worker wearing a protective suit collects garbage from hospitals of patients infected with the coronavirus disease (COVID-19), to be burnt, in the holy city of Najaf, Iraq, August 27, 2020. Picture taken August 27, 2020. REUTERS/Alaa Al-Marjani

A worker wearing a protective suit collects garbage of patients infected with the coronavirus disease (COVID-19), to be burnt, in the holy city of Najaf, Iraq, August 27, 2020. Picture taken August 27, 2020. REUTERS/Alaa Al-Marjani

Workers wearing protective suits, collect garbage from hospitals of patients infected with the coronavirus disease (COVID-19), to be burnt, in the holy city of Najaf, Iraq, August 27, 2020. Picture taken August 27, 2020. REUTERS/Alaa Al-Marjani

A garbage collector throws rubbish into a truck from a house of a man who has recovered from the coronavirus disease (COVID-19), in the holy city of Najaf, Iraq, August 27, 2020. Picture taken August 27, 2020. REUTERS/Alaa Al-Marjani

Iraqi municipal workers rest, amid the spread of the coronavirus disease (COVID-19), in the holy city of Najaf, Iraq, August 26, 2020. Picture taken August 26, 2020. REUTERS/Alaa Al-Marjani

Iraqi municipal workers rest, amid the spread of the coronavirus disease (COVID-19), in the holy city of Najaf, Iraq, August 26, 2020. Picture taken August 26, 2020. REUTERS/Alaa Al-Marjani

A worker wearing a protective suit burns garbage from hospitals of patients infected with the coronavirus disease (COVID-19), in the holy city of Najaf, Iraq, August 27, 2020. Picture taken August 27, 2020. REUTERS/Alaa Al-Marjani

Iraqi people collect recyclable garbage at a dump, amid the spread of the coronavirus disease (COVID-19), in the holy city of Najaf, Iraq, August 26, 2020. Picture taken August 26, 2020. REUTERS/Alaa Al-Marjani TPX IMAGES OF THE DAY

Iraqi people collect recyclable garbage at a dump, amid the spread of the coronavirus disease (COVID-19), in the holy city of Najaf, Iraq, August 26, 2020. Picture taken August 26, 2020. REUTERS/Alaa Al-Marjani

A cleaner disinfects the chairs of the Amazonas Theatre during its reopening amid the outbreak of the coronavirus disease (COVID-19) in Manaus, Brazil August 5, 2020. Picture taken August 5, 2020. REUTERS/Bruno Kelly

Boxing - Frank Warren news conference, National Maritime Museum, Greenwich - July 21, 2020 Cleaner cleans the area before the press conference REUTERS/Andrew Couldridge

Boxing - Frank Warren news conference, National Maritime Museum, Greenwich - July 21, 2020 Cleaners cleans the area before the press conference REUTERS/Andrew Couldridge

Boxing - Frank Warren news conference, National Maritime Museum, Greenwich - July 21, 2020 Cleaner cleans the area before the press conference REUTERS/Andrew Couldridge

Boxing - Frank Warren news conference, National Maritime Museum, Greenwich - July 21, 2020 Cleaner cleans the area before the press conference REUTERS/Andrew Couldridge

Boxing - Frank Warren news conference, National Maritime Museum, Greenwich - July 21, 2020 Cleaner cleans the area before the press conference REUTERS/Andrew Couldridge

Boxing - Frank Warren news conference, National Maritime Museum, Greenwich - July 21, 2020 Cleaner cleans the area before the press conference REUTERS/Andrew Couldridge

A street cleaner pulls up outside the closed door of the School live music venue following an outbreak of the coronavirus disease (COVID-19) in Beijing, China, July 17, 2020. Picture taken July 17, 2020. REUTERS/Thomas Peter

Protective eyewear, vacuum cleaners, and cleaning products are displayed on a shelf marked with "Complete protection solutions" in a retail store amid the coronavirus disease (COVID-19) outbreak, in Quezon City, Metro Manila, Philippines, July 13, 2020. REUTERS/Eloisa Lopez

A street cleaner walks by Saks Fifth Avenue, reopened after being closed during the outbreak of the coronavirus disease (COVID-19) in Manhattan, New York City, U.S., July 11, 2020. REUTERS/Andrew Kelly

A woman poses with a cleaner as people gather in Soho, as restrictions are eased following the outbreak of the coronavirus disease (COVID-19), in London, Britain July 4, 2020. REUTERS/Henry Nicholls

Cleaners clear trash as people gather in Soho, as restrictions are eased following the outbreak of the coronavirus disease (COVID-19), in London, Britain July 4, 2020. REUTERS/Henry Nicholls

A cleaner wearing a protective mask makes up a room at the Shangri-La hotel, amid concerns about the spread of the coronavirus disease (COVID-19), in Colombo, Sri Lanka, July 1, 2020. REUTERS/Dinuka Liyanawatte

A cleaner wearing a protective mask cleans the elevator doors at the Shangri-La hotel, amid concerns about the spread of the coronavirus disease (COVID-19), in Colombo, Sri Lanka, July 1, 2020. REUTERS/Dinuka Liyanawatte

A cleaner wearing a protective mask makes up a room at the Shangri-La hotel, amid concerns about the spread of the coronavirus disease (COVID-19), in Colombo, Sri Lanka, July 1, 2020. REUTERS/Dinuka Liyanawatte

A cleaner wears a protective face mask and gloves while she makes up a suite room after an easing of restrictions imposed to control the spread of the coronavirus disease (COVID-19), at Catalonia Ronda hotel in downtown Ronda, southern Spain June 30, 2020. REUTERS/Jon Nazca

A cleaner works in the lobby of MGM National Harbor as the hotel and casino opened its doors to guests after an easing of restrictions to control the spread of the coronavirus disease (COVID-19) in Oxon Hill, Maryland, U.S., June 29, 2020. REUTERS/Kevin Lamarque

A cleaner works in the lobby of MGM National Harbor as the hotel and casino opened its doors to guests after an easing of restrictions to control the spread of the coronavirus disease (COVID-19) in Oxon Hill, Maryland, U.S., June 29, 2020. REUTERS/Kevin Lamarque

A cleaner walks toward the atrium of MGM National Harbor as the complex opened its doors to guests after an easing of restrictions to control the spread of the coronavirus disease (COVID-19) in Oxon Hill, Maryland, U.S., June 29, 2020. REUTERS/Kevin Lamarque

A street cleaner disinfects a street wearing protective clothing (PPE), during the coronavirus disease (COVID-19) outbreak, in the municipality of Breves, on Marajo island, Para state, Brazil, June 3, 2020. Picture taken June 3, 2020. REUTERS/Ueslei Marcelino

A cleaner wears a protective mask while she makes up a room after the Government eased the nationwide lockdown, following the coronavirus disease (COVID-19) outbreak, at the Sofitel Legend Metropole hotel, which was the venue of the February 2019 Trump-Kim summit, in Hanoi, Vietnam June 26, 2020. REUTERS/Kham

A cleaner wears a protective mask while she makes up a room after the Government eased the nationwide lockdown, following the coronavirus disease (COVID-19) outbreak, at the Sofitel Legend Metropole hotel, which was the venue of the February 2019 Trump-Kim summit, in Hanoi, Vietnam June 26, 2020. REUTERS/Kham

A cleaner wears a protective mask while she makes up a room after the Government eased the nationwide lockdown, following the coronavirus disease (COVID-19) outbreak, at the Sofitel Legend Metropole hotel, which was the venue of the February 2019 Trump-Kim summit, in Hanoi, Vietnam June 26, 2020. REUTERS/Kham

A cleaner wears a protective mask while she walks along a corridor after the Government eased the nationwide lockdown following the coronavirus disease (COVID-19) outbreak, at the Sofitel Legend Metropole hotel, which was the venue of the February 2019 Trump-Kim summit, in Hanoi, Vietnam June 26, 2020. REUTERS/Kham

A street cleaner disinfects a street wearing protective clothing (PPE), during the coronavirus disease (COVID-19) outbreak, in the municipality of Breves, on Marajo island, Para state, Brazil, June 3, 2020. REUTERS/Ueslei Marcelino SEARCH "COVID-19 BRAZIL AMAZON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

A cleaner sprays disinfectant on a traffic light, as the spread of the coronavirus disease (COVID-19) continues, in London, Britain June 23, 2020. REUTERS/Toby Melville

A street cleaner works in front of Mahatma Gandhi statue, ahead of Black Lives Matter protest, following the death of George Floyd who died in police custody in Minneapolis, in London, Britain, June 19, 2020. REUTERS/Hannah Mckay

A cleaner clear dishes as people dine at a hawker center in Singapore as the city state reopens the economy amid the coronavirus disease (COVID-19) outbreak, June 19, 2020. REUTERS/Edgar Su

A cleaner walks past vacant arrival and departure bays at the Liuliqiao long-distance bus station that was shut after a new outbreak of the coronavirus disease (COVID-19) in Beijing, China June 18, 2020. REUTERS/Thomas Peter

A cleaner sanitises a bin, amid the spread of the coronavirus disease (COVID-19), in London, Britain June 17, 2020. REUTERS/Hannah McKay

A cleaner sanitises a pedestrian crossing, amid the spread of the coronavirus disease (COVID-19), in London, Britain June 17, 2020. REUTERS/Hannah McKay

A cleaner sanitises a pedestrian crossing, amid the spread of the coronavirus disease (COVID-19), in London, Britain June 17, 2020. REUTERS/Hannah McKay

A cleaner sanitises a pedestrian crossing, amid the spread of the coronavirus disease (COVID-19), in London, Britain June 17, 2020. REUTERS/Hannah McKay

A cleaner sanitises a bin, amid the spread of the coronavirus disease (COVID-19), in London, Britain June 17, 2020. REUTERS/Hannah McKay

A cleaner sanitises a bin, amid the spread of the coronavirus disease (COVID-19), in London, Britain June 17, 2020. REUTERS/Hannah McKay

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 16, 2020 A cleaner wipes down the barriers in the grand stands during Day One of Royal Ascot, as racing resumes behind closed doors after the outbreak of the coronavirus disease (COVID-19) Julian Finney/Pool via Reuters

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 16, 2020 A cleaner wipes down the barriers in the grand stands during Day One of Royal Ascot, as racing resumes behind closed doors after the outbreak of the coronavirus disease (COVID-19) Julian Finney/Pool via Reuters

A street cleaner disinfects the button of a traffic light, as shops re-open amid the coronavirus disease (COVID-19) outbreak, in New Bond Street in London, Britain June 15, 2020. REUTERS/Henry Nicholls

A street cleaner disinfects a trash bin at Oxford Street, amid the spread of the coronavirus disease (COVID-19) in London, Britain June 15, 2020. REUTERS/Hannah McKay

A street cleaner disinfects a traffic light at Oxford Street, amid the spread of the coronavirus disease (COVID-19) in London, Britain June 15, 2020. REUTERS/Hannah McKay

A man takes a picture of a graffiti depciting a cleaner wearing protective gear spraying viruses with the face of Brazil's President Jair Bolsonaro amid the coronavirus disease (COVID-19) outbreak, in Rio de Janeiro, Brazil, June 12, 2020. REUTERS/Sergio Moraes