Paolo Zanotto, researcher at the Institute of Biomedical Sciences of the University of Sao Paulo, speaks during a press conference at the Institute of Biomedical Sciences of the Sao Paulo University, on January 8, 2016 in Sao Paulo, Brazil. Researchers at the Pasteur Institute in Dakar, Senegal are in Brazil to train local researchers to combat the Zika virus epidemic. AFP PHOTO / NELSON ALMEIDA / AFP / NELSON ALMEIDA (Photo credit should read NELSON ALMEIDA/AFP/Getty Images)
