Corrigendum
Bulletin of the World Health Organization 2009;87:579-579. doi: 10.2471/BLT.09.100809
In volume 87, Number 7, July 2009, page 491, the first paragraph and the second photo the name should be “Carlos Justiniano Ribeiro Chagas” and the second photo should be “Courtesy of the Casa de Oswaldo Cruz”.