Figure 2. Proportion of P.vivax infections diagnosed during 8 consecutive cross-sectional surveys in Remansinho, Brazil, that were symptomatic (black bar segments) and asymptomatic (white bar segments) according to parasite density estimated by quantitative PCR.

The bar widths are proportional to the number of cases within each parasite density class. A total of 129 P. vivax infections were classified according to the presence of symptoms and parasite density.