FIG. 4.

Induction of specific cytotoxic T lymphocytes against pp65 CMV matrix protein in volunteers given doses of a canarypox virus vector containing the gene for pp65 at 0, 3, and 6 months (arrows). Black triangles indicate previously seronegative volunteers, open circles previously seropositive volunteers, and open squares seronegative volunteers who received a placebo. Arrows signify vaccinations. (Reprinted from reference 42 with permission of the publisher).