Sneha Khedkar in The Scientist:More than a century ago, two scientists spent years trying to tame the deadly bacterium that causes tuberculosis. They administered the first dose of the vaccine, now called Bacillus Calmette–Guérin (BCG), to an infant whose mother had died of the disease.1 Since then, with billions of doses given, the shot has surprised scientists with its capabilities beyond preventing tuberculosis. Researchers have found that BCG also helps prevent type 1 diabetes, reduce multiple sclerosis relapse, and treat bladder cancer. Enjoying the content on 3QD? Help keep us going by donating now.