Yellow fever vaccine Foundation to improve the vaccine from the "Asibi" strain, discovered that a favorable chance mutation in the attenuated virus had produced a highly efficacious strain that was named 17D. After field trials in Brazil, over one million people were vaccinated by 1939, without severe complications. For his work on the yellow fever vaccine, Theiler received the 1951 Nobel Prize in Physiology or Medicine. Only the 17D vaccine remains in use today. The outbreak of yellow fever in Angola in January 2016 has raised concerns about whether the global supply of vaccine is adequate to meet the need during a large
Nobel Prize controversies been favored to receive the Prize, but a committee member was later quoted as saying that they would have been "too predictable, too popular." The 1974 prize was denied to Graham Greene, Vladimir Nabokov, and Saul Bellow in favor of a joint award for Swedish authors Eyvind Johnson and Harry Martinson—both Nobel judges and unknown outside their home country. Bellow won in 1976; neither Greene nor Nabokov took home the prize. The 1970 prize was awarded to Soviet dissident Aleksandr Solzhenitsyn, who did not attend the ceremony in Stockholm for fear that the Soviet Union would prevent his return. His