FIG 6.

Comparison of prior distributions for the probability of inapparent CHIKV infection. Prior distributions, estimated from the literature, from epidemics caused by different lineages (A) and in different geographical settings (B) are shown. A prior distribution for epidemics caused by the non-IOL-strain ECSA lineage, with respect to the proportion of inapparent infections, could not be estimated from the single non-IOL-strain ECSA lineage study that met our inclusion and exclusion criteria. As a result, the prior estimated for IOL strain ECSA lineage outbreaks (A, in yellow) very closely mirrors the prior estimated for all ECSA lineage outbreaks (in blue) faintly visible below it. n, number of distinct populations contributing to the estimation of the prior distribution’s hyperparameters.