Special Report: Here’s what we know about Zika

After infiltrating Africa and Asia, stealthy virus invades the Americas

aedes aegypti mosquito

RISING THREAT  The Aedes aegypti mosquito, seen here emerging from its underwater pupa, is a common carrier of the Zika virus. 

© Alex Wild

View interactive map

A stealth virus, most often borne on the wings of a ubiquitous predator, is spreading across the Americas.