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Jean-Marie Camille Guérin (22 December 1872 - 9 June 1961) was a French veterinarian, bacteriologist and immunologist who, together with Albert Calmette, developed the Bacillus Calmette-Guérin (BCG), a vaccine for immunization against tuberculosis.

Camille Guérin was born in Poitiers to a family of modest means. His father died of tuberculosis in 1882 (as well as his wife, in 1918). He studied veterinary medicine at the Ecole Nationale Vétérinaire d'Alfort from 1892 to 1896, working, while a student, as an assistant to pathologist Edmond Nocard (1850-1903).