Fig. 4From: Asymptomatic Plasmodium vivax infections induce robust IgG responses to multiple blood-stage proteins in a low-transmission region of western ThailandSerocatalytic models fitted to cross-sectional data on age-dependent seropositivity for nine Plasmodium vivax antigens. Black squares denote the proportion of seropositive individuals and vertical bars denote the 95% confidence interval. Model 1 (blue) assumes a constant seroconversion rate over time. Model 2 (green) assumes a stepwise reduction in seroconversion rateBack to article page