Jaymi Heimbuch / Santa Catalina Island Fox (Urocyon littoralis catalinae) biologist, Julie King, vaccinating fox against canine distemper virus, Santa Catalina Island, Channel Islands, California

David Perpinan / Vaccination of a male Brown bear (Ursus arctos) anaesthetised in Slovenia for a reintroduction project in the Pyrenees, Jelen Reserve, Slovenia, June, 2016.

Neil Aldridge / European Badger (Meles meles) exiting a cage trap after being vaccinated and marked with spray paint by Defra field workers during bovine tuberculosis (bTB) vaccination trials in Gloucestershire, Unit...

Neil Aldridge / Defra Field Worker marks a European Badger (Meles meles) with spray paint after successfully vaccinating it in a cage trap as part of bovine tuberculosis (bTB) vaccination trials in Gloucestershire, U...

Neil Aldridge / Defra Field Workers dispose of a used syringe as part of biosecurity measures after vaccinating a European Badger (Meles meles) during bovine tuberculosis (bTB) vaccination trials on farmland in Glouc...

Neil Aldridge / Defra Field Worker prepares a baited cage trap to catch a European Badger (Meles meles) for vaccination during bovine tuberculosis (bTB) vaccination trials in Gloucestershire, United Kingdom. June 201...

Neil Aldridge / Defra Field Worker baits a cage trap with peanuts in preparation for carrying out the vaccination of European Badgers (Meles meles) during bovine tuberculosis (bTB) vaccination trials in Gloucestershi...

Neil Aldridge / Defra Field Workers prepare a baited cage trap to catch a European Badger (Meles meles) for vaccination during bovine tuberculosis (bTB) vaccination trials in Gloucestershire, United Kingdom. June 201...

Enrique Lopez-Tapia / Baby receiving child receiving oral vaccine against polio, at infant medical centre, Canogo Island, Guinea-Bissau, December 2013.

Enrique Lopez-Tapia / Children with their mothers at infant medical centre to be vaccinated against polio, Canogo Island, Guinea-Bissau, December 2013.

Tom Marshall / Badger (Meles meles) released after being given bovine TB vaccine by Wildlife Trust in south Cheshire. Rock is used to bury peanuts used for attracting badger to live traps. May, 2013.

Tom Marshall / Badger (Meles meles) just before release after being given bovine TB vaccine by Wildlife Trust in south Cheshire. May, 2013.