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 military junta, which decided not to allow her to attend the awarded ceremony. In 2017 her Nobel prize became a matter of controversy after United Nations' report which said Myanmar’s military carried out an act of genocide against Rohingya Muslims, an ethnic minority in Myanmar. Suu Kyi has repeatedly refused to speak out against violence committed by the military against the Rohingya and her silence over the mass killings has been likened by researchers to “legitimising genocide”. The 1990 prize went to Mikhail Gorbachev "for his leading role in the peace process which today characterizes important parts of the international