Madagascar plague expert fears Black Death that has killed 140 people in Madagascar become untreatable and spread to the UK

Professor Paul Hunter also warned it was possible for the disease to reach Europe and North America like the Ebola virus did in 2014 following an outbreak in West Africa. Hunter, who lectures in health protection at the University of East Anglia, said: "As with any disease, it"s a real worry that it mutates and become untreatable."