FIG. 2.
Viral load in unimmunized control rhesus macaques challenged orally with SIVmac251. Six unimmunized juvenile rhesus macaques were challenged orally with SIVmac251, as described in the text. Values on the x axis indicate weeks postchallenge. Values on the y axis indicate viral RNA equivalents/ml of plasma, as measured by TaqMan PCR.