A US Centers for Disease Control and Prevention (CDC) team Monday began work on a "case-control" study aimed at determining whether the Zika virus truly does cause babies to be born with the devastating birth defect microcephaly, as Brazilian researchers strongly suspect. The study began with a training session in Joao Pessoa, a city in Brazil's northeastern region that is the epicenter of the South American country's Zika outbreak. The CDC team is working with dozens of members of Brazil's health ministry as well Paraiba state's health secretariat.
