Figure 2

Kaplan–Meier survival curves for C57BL/6 mice in treatment groups injected with pIL-15 or control plasmid with or without electroporation. Groups of mice (P−V−E−, P−V+E+, P+V−E− and P+V−E+) were treated as described in the Materials and methods section and were followed for tumor regression and long-term survival (up to 100 days after initiation of the treatment regimens).