Comparison of Salmonella antigen protectivity against primary infection and immunogenicity in convalescent resistant mice.

A) Relationship between antigen protectivity against primary infection and cognate CD4 T cell responses in convalescent mice (same data as Fig. 1A). Protectivity is expressed as “survival time extension”, which is the difference in median survival time of a group of five immunized mice compared to a control group of five mice that were immunized with GFP. B) Relationship between antigen protectivity and serum antibody responses in convalescent mice (same data as Fig. 1B).