Figure 1From: Kinetics of non-structural protein 1, IgM and IgG antibodies in dengue type 1 primary infectionDetection of NS1 in 313 serum specimens from 140 DENV1 infected patients. Data represent the OD450 value of serum samples tested at 1:10 dilution. The solid line represents the cutoff value. The result was considered positive if a sample yielded an OD450 value above the cutoff.Back to article page