Chikungunya incidence rates surpassed dengue rates in Caribbean countries in 2014.
Aedes aegypti and Aedes albopictus, the vectors of dengue and chikungunya, have coexisted in the Americas for 30 years.
Ae. aegypti is a proven vector of chikungunya, but Ae. albopictus is also expected to play a major role.
These uncontrolled Aedes species populations will spread CHIKV throughout the Americas.
Weakness of current prevention and control methods represents a perfect opportunity for CHIKV expansion in the Americas.