Max Theiler working on yellow fever. In 1926, they disproved Hideyo Noguchi's hypothesis that yellow fever was caused by the bacterium "Leptospira icteroides." In 1928, the year after the disease was identified conclusively as a virus, they showed that the African and South American viruses are immunologically identical. (This followed Adrian Stokes' inducing yellow fever in rhesus macaques from India). In the course of this research, Theiler contracted yellow fever, but survived and developed immunity. In 1930, Theiler moved to the Rockefeller Foundation in New York, where he later became director of the Virus Laboratory. He was professor of epidemiology and public
Nobel Prize controversies in his novel, "Doctor Zhivago"." Pasternak died without ever receiving the prize. He was eventually honored by the Nobel Foundation at a banquet in Stockholm on 9 December 1989, when they presented his medal to his son. The 2010 Nobel Peace Prize was awarded to Liu Xiaobo while he was serving a prison sentence for "subversion of the state", with the Chinese government not allowing him or his family members to attend the ceremony. Two laureates voluntarily declined the Nobel Prize. Jean-Paul Sartre declined the 1964 prize for Literature, stating, "A writer must refuse to allow himself to be transformed