Areas with active mosquito-borne transmission of Zika virus
- Prior to 2015, Zika virus outbreaks occurred in areas of Africa, Southeast Asia, and the Pacific Islands.
- In May 2015, the Pan American Health Organization (PAHO) issued an alert regarding the first confirmed Zika virus infections in Brazil.
- Currently, outbreaks are occurring in many countries.
- Zika virus will continue to spread and it will be difficult to determine how and where the virus will spread over time.
- Local mosquito-borne transmission of Zika virus has been reported in the Commonwealth of Puerto Rico, the US Virgin Islands, and America Samoa.
*Territories of the United States are sub-national administrative divisions overseen by the US federal government.
- No local mosquito-borne Zika virus disease cases have been reported in US states, but there have been travel-associated cases.
- With the recent outbreaks, the number of Zika cases among travelers visiting or returning to the United States will likely increase.
- 80% of cases will not be diagnosed.
- These imported cases could result in local spread of the virus in some areas of the United States.