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Kaplan-Meier survival curves: TCI versus i.m. Four weeks after the final boost, mice were challenged intranasally with 234,000 Bacillus anthracis Ames strain spores. Survival of mice immunized i.m. with 20 μg alum-adsorbed rPA is represented as dotted lines, and survival of mice immunized with (0.2 to 20 μg) rPA by TCI is represented as solid lines. Time is shown in days.
