A new mosquito-borne virus is fast spreading across the Americas and the Caribbean, with cases reported among travelers returning to the U.S.
Zika virus outbreaks are proliferating across multiple countries and territories in the region, such as Puerto Rico, Mexico, Brazil, Panama and Venezuela. They have been associated with increased reports of birth defects, including babies with very small heads, and of paralysis in adults.
There is no vaccine or specific drug to treat the virus.
CNBC takes a look at the Zika virus.