Fig. 1From: Herpes simplex virus type 1 and type 2 in the Netherlands: seroprevalence, risk factors and changes during a 12-year periodWeighted seroprevalence of HSV-1 and HSV-2 by gender, age and Pienter study. * Difference in seroprevalence between Pienter-1 and Pienter-2 is statistically significant (p < 0.05)Back to article page