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Aedes aegypti mosquitos are seen in containers at a lab of 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 / NELSON ALMEIDA        (Photo credit should read NELSON ALMEIDA/AFP/Getty Images)
Aedes aegypti mosquitos are seen in containers at a lab of 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 / NELSON ALMEIDA        (Photo credit should read NELSON ALMEIDA/AFP/Getty Images)

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    Peter Piot: Zika vaccine years away

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Peter Piot: Zika vaccine years away

Dr. Peter Piot, one of the co-discoverers of the Ebola virus, discusses the threats and challenges posed by Zika.

Peter Piot: Zika vaccine years away

Dr. Peter Piot, one of the co-discoverers of the Ebola virus, discusses the threats and challenges posed by Zika.