People in Kathmandu joke that the face mask has now become part of the national dress – an indispensable accessory in an effort to protect themselves from the dust. Nepal has the worst air quality in the world, according to the Environmental Performance Index. (Photo by Pete Pattisson/The Guardian)

A couple wears face masks as they share a moment during sunset on January 31, 2020 in Hong Kong, China. With over 9800 confirmed cases of Novel coronavirus (2019-nCoV) around the world, the virus has so far claimed over 200 lives. (Photo by Anthony Kwan/Getty Images)

A man wearing a beard imprinted facemask as a preventive measure against the COVID-19 coronavirus walks along a street in New Delhi on June 19, 2020. India has recorded more than 380,000 cases of COVID-19, the fourth-highest in the world, with over 12,500 deaths, health ministry data show. (Photo by Jewel Samad/AFP Photo)

Abby Dow (L) of England scores a try during the Women's Rugby World Cup Semi Final match between Canada and England at Eden Park in Auckland, New Zealand, 05 November 2022. (Photo by Aaron Gillions/EPA/EFE)

Belgium fan wears a devil mask attends the Qatar 2022 World Cup Group F football match between Croatia and Belgium at the Ahmad Bin Ali Stadium in Al-Rayyan, west of Doha on December 1, 2022. (Photo by Stephane Mahe/Reuters)

Kylian Mbappe of France celebrates his second goal during the FIFA World Cup Qatar 2022 Round of 16 match between France and Poland at Al Thumama Stadium on December 4, 2022 in Doha, Qatar. (Photo by Fabrizio Bensch/Reuters)

Croatia's Josko Gvardiol reacts after Argentina's Julian Alvarez scored his side's second goal during the World Cup semifinal soccer match between Argentina and Croatia at the Lusail Stadium in Lusail, Qatar, Tuesday, December 13, 2022. (Photo by Martin Meissner/AP Photo)

Morocco player Yassine Bounou's son, Isaac, plays on the pitch after the country's World Cup win against Portugal at Al Thumama Stadium in Doha, Qatar on December 10, 2022. (Photo by Carl Recine/Reuters)