FIG. 4.
Antibody neutralizing activity in plasma of rhesus monkeys following DNA prime-rAd boost immunizations. Plasma samples were obtained from vaccinated and control monkeys at week 28 postimmunization (2 weeks following rAd boost) and were tested at a 1:5 dilution for neutralizing activity against panels of clade-A, clade-B, and clade-C HIV-1 isolates. The dashed line represents a reference point of 20% neutralization, as noted in Results. Data are presented as the mean percent neutralizing activity ± SEM from six monkeys per group. Note that the top panel of clade-A viruses also includes a control MuLV Env pseudovirus.