A tricky vaccination programme as wildlife experts race to save Siberian tigers

© Shutterstock / GUDKOV ANDREYA Siberian tiger races after its prey but the species is elusive, roaming across large areas of                         mountains and forests in the Russian taiga, which makes immunisation particularly difficult.
A Siberian tiger races after its prey but the species is elusive, roaming across large areas of mountains and forests in the Russian taiga, which makes immunisation particularly difficult.