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The co-recipient of Baruch S. Blumberg's Nobel Prize in Physiology or Medicine was Daniel Carleton Gajdusek. Gajdusek, an American physician and medical researcher, shared the 1976 prize for his discoveries concerning new human viruses and the diseases they cause, particularly focusing on kuru, a degenerative brain disorder found among the Fore people of Papua New Guinea. His research contributed significantly to the understanding of slow virus infections and prion diseases.