FIG. 2.
Plasma viral RNA levels of rhesus macaques challenged with SHIVW6.1D (first arrow), SHIVhan2 (second arrow, triangles) or SHIVsf13 (second arrow, circles) and SHIV89.6p (third arrow) as determined by quantitative RT-PCR (SIV gag) (57). Group A was immunized with gp120W6.1D-SBAS1; group B was immunized with gp120W6.1D-SBAS2; group C was immunized with gp120W6.1D in an experimental adjuvant and in SBAS2; group D consists of nonimmunized control animals. For details, see Materials and Methods.