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
2006 Nobel Peace Prize that Yunus was a poor choice for the award, stating: "...the Nobel committee could have made a braver, more difficult, choice by declaring that there would be no recipient at all." He is one of only seven persons to have won the Nobel Peace Prize, Presidential Medal of Freedom, and the Congressional Gold Medal. Other notable awards include the Ramon Magsaysay Award in 1984, the World Food Prize, the International Simon Bolivar Prize (1996), the Prince of Asturias Award for Concord and the Sydney Peace Prize in 1998, and the Seoul Peace Prize in 2006. Additionally, Yunus has been awarded