Figure 6.

Intracellular interferon (IFN)-γ analysis of spleen cells from vaccinated mice. Spleen cells from mice vaccinated three times with (a) virus-like replicon particles (VRP)-neu or (b) VRP-hemagglutinin (HA) were analyzed for the presence of intracellular IFN-γ after in vitro culture with a neu-specific peptide.