ELISA p24 Antigen Concentration and Viral Load Summary Statistics.
Upper limit of detection for the VL assay = 15,000,000, any observation that exceeded 15,000,000 recorded as 15,000,001.
Group 1: Antigen positive, antibody negative i.e. acute HIV infection (Ag+ Ab−).
Group 2: Antigen positive, antibody positive i.e. early HIV infection (Ag+ Ab+).