Volunteers wearing personal protective equipment (PPE) carry the body of a victim of the Covid-19 coronavirus to a cemetery in Hlegu Township in Yangon on July 10, 2021. (Photo by Ye Aung Thu/AFP Photo)

A group of volunteers dressed as elves and a man dressed as the grinch take part in a Christmas celebration organised by the NGO “Unos Venezolanos” in the neighbourhood of Petare, in Caracas, Venezuela on December 21, 2022. (Photo by Gaby Oraa/Reuters)

A volunteer feeds a swift chick after it was found on the ground during a heatwave and given to the Centre Ornithologique de Readaptation in Genthod near Geneva, Switzerland on July 25, 2023. (Photo by Denis Balibouse/Reuters)

Volunteers receive a professional massage from qualified therapists as they break a world record for the largest ever simultaneous massage during Massage en Masse at Lavandula Lavender Farm on March 30, 2010 in Daylesford, Australia. Two hundred and sixty three massage therapists each massaged a volunteer, breaking the former world record of 167, set in 2009 in Washington DC. (Photo by Scott Barbour/Getty Images)

Men dressed as Elvis Presley carry a volunteer during a street parade at the 25th annual Parkes Elvis Festival in the rural Australian town of Parkes, west of Sydney, January 14, 2017. (Photo by Jason Reed/Reuters)

Military volunteers and civilians take a shooting training at a range in Rostov region on November 11, 2022, amid the ongoing Russian military action in Ukraine. (Photo by AFP Photo/Stringer)

The king penguin in his moulting suit joins his waddle on their way to the water despite not being waterproof yet at Volunteer Point on the Falkland Islands, 2023. (Photo by Judy Rogero/Media Drum Images)