Fig. 5
From: Role of monkeys in the sylvatic cycle of chikungunya virus in Senegal
Forces of infection by species and year. Panels show the forces infection (λ(t)) and p-values (Chi-squared test comparing model to saturated model) for the fit across years for C. sabaeus, E. patas, and P. papio, respectively. Too few E. patas were collected in 2011 to obtain estimates. We included all monkeys <1-year-old in the 0-age category (we present seropositivity results for monkeys under 3 years of age in Supplementary Fig. 4). Points are the proportion of seropositve monkeys per age year with confidence intervals. Thick black line is the fit of the force of infection, gray bands are bootstrap confidence intervals for the fit
