Revellers in Leeds, United Kingdom were excited to be out and about again on July 18, 2021. At a minute past midnight, England dropped most of its remaining Covid-19 social restrictions, such as those requiring indoor mask-wearing and limits on group gatherings. These changes come despite rising infections, pitting the country's vaccination programme against the virus's more contagious Delta variant. (Photo by Ioannis Alexopoulos/PA Wire Press Association via Getty Images)

Choo Gaeun of South Korea reacts during competition with Jin Jongoh of South Korea during the mixed 10m air pistol team qualification during Tokyo 2020 Olympics at Asaka Shooting Range in Tokyo, Japan on July 27, 2021. (Photo by Ann Wang/Reuters)

A bakery worker carries fresh bread in Cairo, Egypt on August 1, 2021. (Photo by Amr Abdallah Dalsh/Reuters)

Hot-air balloons float over the Oka River during the Russian Sky International Balloon Festival in Ryazan Region, Russia on July 26, 2021. (Photo by Alexander Ryumin/TASS)

Models pose during the Paul Costelloe Presentation during London Fashion Week September 2021 on September 17, 2021 in London, England. (Photo by Matt Crossick/Empics Entertainment/Getty Images)

Balinese I Ketut Widanta or known as Lelut rides to collect fodder with his dogs sits on his motorbike in Canggu, Bali, Indonesia on November 05, 2021. Lelut becomes famous for his attractive style of carrying six of his rescued dogs with a modified motorbike while collecting food waste from restaurants. Currently, he takes care of twenty rescued dogs which some of them were dumped by the owners on the street due to the Covid-19 pandemic. Often he receives dog food donations from dog lovers since the collapse of Bali tourism affects his income. (Photo by Johannes P. Christo/Anadolu Agency via Getty Images)

In this image released by Ukrainian Defense Ministry Press Service, Ukrainian soldiers use a launcher with US Javelin missiles during military exercises in Donetsk region, Ukraine, Thursday, December 23, 2021. (Photo by Ukrainian Defense Ministry Press Service via AP Photo)

Mexico City resident Romina Montoya takes a playful selfie wearing a protective face mask over her eyes and nose, in Playa del Carmen, Quintana Roo state, Mexico, Wednesday, January 6, 2021. Concern is spreading that the critical winter holiday tourism success could be fleeting because it came as COVID-19 infections in both Mexico and the United States were reaching new heights. (Photo by Emilio Espejel/AP Photo)