2021 Case Counts in the US

2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014


Provisional Data as of November 16, 2021

Chikungunya virus disease became a nationally notifiable condition in 2015. Cases are reported to CDC by state and local health departments using standard case definitions. This webpage contains provisional data reported to ArboNET for 2021.

US States

  • 17 chikungunya virus disease cases reported
    • 17 cases in travelers returning from an affected area
    • 0 cases acquired through presumed local mosquito-borne transmission
    • 0 case acquired through laboratory transmission

US territories

  • 0 chikungunya virus disease cases reported
    • 0 cases in travelers returning from an affected area
    • 0 cases acquired through presumed local mosquito-borne transmission