John Hansen-Flaschen
Contributor
LOCATION: Philadelphia, PA, United States
Professor of medicine, University of Pennsylvania, Philadelphia.
Primary Contributions (12)
BCG vaccine, vaccine against tuberculosis. The BCG vaccine is prepared from a weakened strain of Mycobacterium bovis, a bacteria closely related to M. tuberculosis, which causes the disease. The vaccine was developed over a period of 13 years, from 1908 to 1921, by French bacteriologists Albert…
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