Figure 3From: A new method for determination of varicella-zoster virus immunoglobulin G avidity in serum and cerebrospinal fluidInfluence of the concentration of specific IgG on single-point avidity indices. Two-fold dilution series of serum and CSF samples were tested in the CSF avidity assay and the avidity index was calculated as the percent ratios of absorbance values for each dilution. F19: Follow-up samples of a patient with acute VZV infection. V2.1 and V9.2: Pairs of serum (S) and CSF (C) of a patient with VZV encephalitis.Back to article page