Figure 1From: Role of complement and antibodies in controlling infection with pathogenic simian immunodeficiency virus (SIV) in macaques vaccinated with replication-deficient viral vectorsDetermination of plasma and cell-associated viral loads. The mean plasma viral load levels (A) and mean cell-associated viremia (B) of three immunized and one control cohort are shown after tonsillar challenge with pathogenic SIVmac239. Viral RNA was determined by real-time PCR whereas cell-associated viremia was analysed by a limiting dilution co-culture assay with mononuclear cells from blood.Back to article page