Léon Charles Albert Calmette ForMemRS was a French physician, bacteriologist and immunologist, and an important officer of the Pasteur Institute. He co-discovered the Bacillus Calmette-Guérin, an attenuated form of Mycobacterium bovis used in the BCG vaccine against tuberculosis. He also developed the first antivenom for snake venom, the Calmette's serum.
