Medawar, Sir Peter Brian

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Medawar, Sir Peter Brian (1915–87) British zoologist, b. Brazil. He shared the 1960 Nobel Prize in physiology or medicine with Sir Frank Macfarlane Burnet for their discovery of acquired immune tolerance. Medawar confirmed that if foreign tissue is introduced in the embryonic stages of development it may be reintroduced later without inducing a negative response from the immune system.

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