Suzi Eszterhas / Vet with koala (Phascolarctos cinereus) male sick with chlamydia, Currumbin Wildlife Hospital, Queensland, Australia, captive.

Suzi Eszterhas / Vet with koala (Phascolarctos cinereus) male sick with chlamydia, Currumbin, Wildlife Hospital, Queensland, Australia, captive.

Suzi Eszterhas / Koala (Phascolarctos cinereus), male sick with chlamydia on scale while under anaesthetic. Currumbin Wildlife Hospital, Queensland, Australia, captive.

Steve O. Taylor (GHF) / Local doctor's sign, N'Djamena market, Chad, 2002-2003.

Ann & Steve Toon / Elephant Population Management Program surgeon Dr Johan Marais, left, of the University of Pretoria's Faculty of Veterinary Science assisted by Dr Dean Hendrickson, director of Colorado State Universi...

Jen Guyton / Nurse Berta Barros, dispensing medication to community members in Momba community in park's buffer zone during Medecins Sans Frontieres visit after Cyclone Idai. Outskirts of Gorongosa National P...

Jen Guyton / Nurse Berta Barros, checking height of child in Momba community in park's buffer zone during Medecins Sans Frontieres event. Outskirts of Gorongosa National Park, Mozambique. April 2019.

Jen Guyton / Woman offering her child's finger to be pricked for malaria test in Momba community in park's buffer zone during Medecins Sans Frontieres event. Outskirts of Gorongosa National Park, Mozambi...

Jen Guyton / Nurse Berta Barros examining baby Rosalina's heart with her mother behind. Rosalina was born during Cyclone Idai. Outskirts of Gorongosa National Park, Mozambique. April 2019.

David Pattyn / Anesthesia nurse instructing anesthesiologists on the use of the intubating room. This room was created especially to intubate Covid-19 infected patients Jeroen Bosch Ziekenhuis, Den Bosch, 's He...

David Pattyn / Anesthesiologist and anesthesia nurses preparing the medication for a Covid-19 infected patient who is about to be operated Jeroen Bosch Ziekenhuis, Den Bosch, 's Hertogenbosch, The Netherlands...

David Pattyn / Intensivist and physician assistant in conversation about their patients on the Corona ICU department Jeroen Bosch Ziekenhuis, Den Bosch, Hertogenbosch, The Netherlands March 2020. EDITORIAL USE ONL...