If you are planning to travel in the Americas, it is advised you look at the Centers for Disease Control and Prevention website for the latest on the Zika Virus outbreak. There are currently over 2 dozen countries and territories with active Zika virus transmission in the Americas alone. Many of the characteristics of the Zika virus are currently being researched.
To stay informed about the latest warnings and discoveries visit:
http://www.cdc.gov/zika/symptoms/index.html
To see the countries and territories with active Zika virus transmissions visit:
http://www.cdc.gov/zika/geo/index.html
CDC Mosquito Bite Prevention Factsheets: