How Brazil joined the quest for a yellow fever vaccine. Interview by Claudia Jurberg and Julia D'Aloisio.

Brazil recently announced an agreement between its Bio-Manguinhos vaccine unit and two US companies to research and develop a new yellow fever vaccine. Claudia Jurberg and Julia D'Aloisio talk to Jaime Benchimol about the controversial history of the development of the vaccine that benefits millions of people today.