In the Kapiti Nature Reserve in southern Kenya, this dromedary is furiously undergoing a PCR test to detect a cousin of COVID-19, Mers, which could one day cause the next global pandemic. Two metres high and weighing 300 kilos, the beast rumbles and struggles, restrained at the neck, muzzle and tail by three camel drivers, while the veterinarian in the blue coat hurriedly proceeds with the dreaded sampling. "Taking a sample from the animal is difficult because you never know what can happen (...) if you do it wrong, it can be even worse because it can hit you, bite...