Baccille Calmette Guérin Vaccine
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Baccille Calmette Guérin (BCG) contains a weakened strain of Mycobacterium bovis. Originally isolated from a cow with tuberculosis by Calmette and Guérin at the Institute Pasteur, Paris, BCG was first used as a vaccine to protect humans from tuberculosis in 1921. The vaccine has been widely used since then to protect children throughout the world from tuberculosis. Today, it is estimated that more than 1 billion people have received BCG.

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