ORIGINAL (replaced): Volunteers are randomized to receive either HIVAC-1e on days 0 and 56 followed by immunization with MN rgp160 vaccine on days 224 and 364, or DryVax control on days 0 and 56 followed by placebo on days 224 and 364. Ten volunteers are entered on the MN rgp160 vaccine arm and two volunteers on the placebo arm.