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IR peptide immunization protects against IR challenge with HIV-gp160 expressing recombinant vaccinia virus. The left bar (▪) shows virus as the log of the number of pfus in ovaries of unimmunized mice and the right bar (□) shows virus titer in the ovaries of immunized mice. Bars = SEM of five mice per group. The difference is significant at P < 0.005 by Student’s t test.
