Table 1. T-cell responses induced by Prostvac.

Test	Result	Comment
Generation of PSA-specific T cells	56.7% (59/104) with ≥ 2-fold increase post-vaccine	Examined 28 d after last vaccine (after expected peak response)
Median magnitude (fold) increase in PSA-specific immune response among responders	5-fold	Level of PSA-specific T cells in responders (30/106 PBMC) similar to level of influenza-specific T cells in same patients.
Evidence of antigen spreading (a.k.a. antigen cascade)	67.9% (19/28)	Immune response post-vaccine to tumor-associated antigens not in vaccine.