Explainer: Where did Zika virus come from and why is it a problem in Brazil?
Written by Amy Y. Vittor, University of Florida From October 2015 to January 2016, there were almost 4,000 cases of babies born with microcephaly in Brazil.鈥�

Written by Amy Y. Vittor, University of Florida From October 2015 to January 2016, there were almost 4,000 cases of babies born with microcephaly in Brazil.鈥�