Summary of subject data.

Subjects with confirmed or suspected CHIKV infection were enrolled in either an endemic cohort (Ponce, Puerto Rico; color coded in orange), a non-endemic cohort (Portland, Oregon; color coded in blue), or an alphavirus naïve cohort (Portland, Oregon; color coded in black). Subjects are assigned an ID with age, country of birth, country of infection, range of time-post infection for serum collection, CHIKV PRNT50 at time of primary blood draw, and reported symptoms displayed.