Figure 4.

SFVeE6,7 tattooing induces long-lasting memory T cells. Mice that survived tumor challenge as depicted in Figure 3 were sacrificed on day 90 after tumor inoculation. Isolated spleen and inguinal lymph node cells were in vitro restimulated for seven days. Activity of restimulated spleen (a) and lymph node (b) cells were analyzed in regular and micro CTL assay, respectively. E:T ratio—effector:target ratio.