• Zika virus is primarily transmitted to people through mosquito bites. Only specific mosquitoes can spread Zika virus. One of those mosquitoes can be found in Indiana from about mid-summer through early fall.


  • Another transmission route is from a pregnant woman to her fetus. When a woman is infected during pregnancy, there is an increased risk for microcephaly and other severe fetal brain defects. A pregnant woman may also pass Zika virus to her newborn during delivery. There has not been any evidence that Zika virus can be transmitted through breast milk.


  • Zika virus can also be spread from one partner to another through sexual activity. It can spread a few days before symptoms develop, and has been found to be present in semen for several months. CDC recommendations for protecting sexual partners can be found here:¬†


  • Blood transfusions may also transmit Zika virus from one person to another. To date, this has not been reported in the US blood supply.


  • Once a person’s infection has subsided, it is believed that a recovered person will be protected from future infections.