Charles Robert Richet

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Charles Robert Richet (August 26, 1850 – December 4, 1935) was a French physiologist who won the 1913 Nobel Prize for Physiology or Medicine for his work on anaphylaxis, his term for the sometimes fatal reaction by a sensitized individual to a second injection of an antigen. His research helped to elucidate problems of hay fever, asthma, and other allergic reactions to foreign substances and explained some cases of intoxication and sudden death not previously understood.