A health worker applies a dose of the AstraZeneca vaccine during the first day of a three-day COVID-19 vaccination campaign for people over age 35 in the Complexo da Maré favela of Rio de Janeiro, Brazil, Brazil, Thursday, July 29, 2021. Some recipients will be monitored to study the rate of protection the vaccines provide and the extent to which virus variants are circulating. (Photo by Bruna Prado/AP Photo)

Wounded women arrive at a hospital for treatment after two blasts, which killed at least five and wounded a dozen, outside the airport in Kabul on August 26, 2021. (Photo by Wakil Kohsar/AFP Photo)

American singer and rapper Ashton Nicole Casey, known professionally as Ashnikko performs on Day 2 of Leeds Festival 2021 at Bramham Park on August 28, 2021 in Leeds, England. (Photo by Matthew Baker/Getty Images)

Sri Lankan mahout Nishanth relaxes with a tame elephant Suddi, who was recently released from government custody following a court order, in Pannipitiya, a suburb of Colombo, Sri Lanka, Sunday, September 12, 2021. (Photo by Eranga Jayawardena/AP Photo)

Filipa Martins of Portugal fails to grab the bar as she performs the uneven bars during the Women's All-Around Final at the 50th FIG Artis​tic Gymnastics World Championships in​ Kitakyushu, Japan, 21 October 2021. (Photo by Kimimasa Mayama/EPA/EFE)

Gizzard, a chihuahua is held by his owner at the 31st Annual Tompkins Square Halloween Dog Parade in New York, U.S., October 23, 2021. Last year the parade was cancelled due to the coronavirus pandemic. (Photo by Caitlin Ochs/Reuters)

Saudi female firearm trainer, Mona Al Khurais, teaches a Saudi boy on safe usage of weapons at the Top-Gun shooting range in Riyadh, Saudi Arabia, October 28, 2021. (Photo by Ahmed Yosri/Reuters)

A Palestinian man dressed as Santa Claus gestures as he rides a camel in Jerusalem's Old City during Christmas celebrations, on December 23, 2021. (Photo by Ahmad Gharabli/AFP Photo)