The Bacille Calmette Guérin (BCG) is a vaccine primarily used against tuberculosis (TB). It's named after its developers, Albert Calmette and Camille Guérin. BCG is made from a weakened strain of Mycobacterium bovis, a cousin of the Mycobacterium tuberculosis that causes TB. This attenuated vaccine has been in use since 1921 and is also employed in certain cancer treatments, particularly bladder cancer.
