Figure 5From: Effect of variable transmission rate on the dynamics of HIV in sub-Saharan Africa Population Attributable Fraction (PAF) due to co-infection. We measured the direct effect of co-infection on the HIV incidence by using the population attributable fractions. (A) The PAF due to co-infection in general, and (B) the PAF due to HSV-2 (solid line), syphilis and gonorrhea (dotted line) and malaria (dashed line).Back to article page