FIG. 6.
Neutralizing antibodies measured after SHIV89.6P challenge. (A) IC50 values (50% neutralization titers) in plasma against the SHIV89.6P challenge virus. Values are means ± SEM for six animals in each group. (B) Percent neutralization of HIV BaL mediated by a 1:5 dilution of plasma. Values are means ± SEM for six animals in each group. (C) A 1:5 dilution of plasma from week 6 postchallenge was tested against a panel of eight HIV-1 strains. The four immunization groups are shown on the x axis; each bar represents one of the eight viruses. The bars show the mean percentages of neutralization ± SEM for six animals per group against each virus. An arbitrary horizontal line was drawn to show 50% neutralization.