Participants wearing masks during a hazy day at the Beijing International Marathon in front of Tiananmen Square, in Beijing, October 19, 2014. (Photo by Reuters/Stringer)
A participant wearing a costume and make-up attends a Halloween parade at Walibi park in Wavre, Belgium, October 25, 2019. (Photo by Yves Herman/Reuters)
Women wearing flower and sprout-like hairpins walk past an advertisement board in Beijing, China, September 25, 2015. Wearing antenna styled hairpins in the shape of various flowers and plants at scenic spots has become a new trend in Beijing. (Photo by Kim Kyung-Hoon/Reuters)
A police officer wearing a Balinese traditional mask, called celuluk, performs as the new coronavirus during a campaign to wear masks as a precaution against the virus outbreak at a market in Bali, Indonesia, Thursday, May 14, 2020. (Photo by Firdia Lisnawati/AP Photo)