Special Report: Here’s what we know about Zika
After infiltrating Africa and Asia, stealthy virus invades the Americas
![aedes aegypti mosquito](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/03/040216_zika-intro_feat_free.jpg?fit=860%2C460&ssl=1)
RISING THREAT The Aedes aegypti mosquito, seen here emerging from its underwater pupa, is a common carrier of the Zika virus.
© Alex Wild