2014 provisional data for the United States

• In 2014, chikungunya was not a nationally notifiable disease in the United States. However, chikungunya cases could be reported to ArboNET, the national surveillance system for arthropod-borne diseases. The following are provisional data reported to ArboNET for 2014; these data will be updated when they are final.

• As of February 10, 2015, a total of 2,492 chikungunya virus disease cases were reported to ArboNET from U.S. states for 2014. Eleven locally-transmitted cases were reported from Florida. All other cases occurred in travelers returning from affected areas.

• A total of 4,513 chikungunya virus disease cases were reported to ArboNET from U.S. territories for 2014 (Table 2). Of these, 4,467 were locally-transmitted cases reported from Puerto Rico and the U.S. Virgin Islands. The remaining 46 cases occurred in travelers returning from other affected areas.

Stephen B. Thacker CDC Library collection

United States