Fig 3. Number of participants with evidence of chikungunya virus infection who reported fever with arthralgia by month and year of illness onset (N = 81*), and number of mosquito pools in which chikungunya virus RNA was detected by RT-PCR (N = 50) from communities with (intervention) or without (non-intervention) autocidal gravid ovitraps (AGO traps) in Puerto Rico, November 2015–February 2016.

*As reported during the serosurvey; 3 participants had unknown timing of illness onset.