Find the missing text [*P**N*]
Background picture associated with the solution.Correct answers: 28
The first user who solved this task is Djordje Timotijevic.
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Albert Bruce SabinDied 3 Mar 1993 at age 86 (born 26 Aug 1906).Polish-American physician and microbiologist best known for developing the first oral polio vaccine (1955), which was administered to millions of children in Europe, Africa, and the Americas beginning in the late 1950s. He was also known for his research in the fields of human viral diseases, toxoplasmosis, and cancer. |