Fig. 6

Survival of mice immunized with the PA spore displaying vaccine and challenged with 6 × 10⁷ CFU (Tox + Cap−) spores of the B. anthracis Sterne strain (equivalent to 100 50% median lethal doses (MLD₅₀s) per animal. ††, P < 0.01; †, P < 0.05; *, P < 0.05