A Chesterfield Borough Police telephone operator tests a gasmask with built in earpiece and microphone. The telephone service is considered one of the most important links in the coordination of ARP operations and must remain operational during air raids, 12th April 1939. (Photo by Fox Photos/Hulton Archive/Getty Images)

The Greyfriars Bobby statue is pictured wearing a mask as the spread of the coronavirus disease (COVID-19) continues, in Edinburgh, Scotland, Britain, March 23, 2020. (Photo by Russell Cheyne/Reuters)

A nurse at St. Joseph's Hospital wears a unique mask as the hospital celebrates the release of a COVID-19 patient after 45 days in their care during the outbreak of the coronavirus disease (COVID-19) in Orange, California, U.S., May 5, 2020. (Photo by Mike Blake/Reuters)

Camila Hormazabal, a 24-year-old sеx worker, uses a laptop to connect to the web and keep an online erotic meeting with a virtual customer in Concepcion, Chile on April 7, 2020. Hormazabal reinvented herself offering sexual services online after the nightclub where she had worked was closed due to the outbreak of the coronavirus disease (COVID-19). (Photo by Juan Gonzalez/Reuters)

American singer/songwriter Ashley Nicolette Frangipane, known professionally as Halsey arrives at Playboy's Midsummer Night's Dream at the Marquee Nightclub at The Cosmopolitan of Las Vegas on July 29, 2018 in Las Vegas, Nevada. (Photo by Gabe Ginsberg/Getty Images)

A dancer attends the final rehearsal for the new “VIVID Grand Show” at Friedrichstadt-Palast in Berlin, Germany, September 26, 2018. (Photo by Hannibal Hanschke/Reuters)

“Oak Sunrise” by professional photographer Alan Price has won the International Garden Photographer of the Year, “Celebrating Our Oaks” competition, run in partnership with Action Oak. Action Oak is a campaign to protect the UK’s oak trees from threats including pests and diseases. (Photo by Alan Price/IGOTY)

Police officers clear the area near Borough market at London Bridge on June 3, 2017 in London, England. Police have responded to reports of a van hitting pedestrians on London Bridge in central London. (Photo by Dan Kitwood/Getty Images)