STUDIES ON THE PROTECTION TEST OF PERTUSSIS VACCINE. IMMUNIZATION PERIOD AND PROTECTIVITY

II. VARIATIONS AMONG MOUSE STRAINS

Abstract

1. A number of protection tests performed using several mouse strains were analyzed statistically.
2. Mouse strains were evaluated in respect to the possession of a considerably high sensitivity to infection against virulent pertussis organisms, relatively high regression coefficient, and differentiating ability of the vaccine's potency.
3. A possibility that mice may manifest their immature immunity to the challenge infection 10 days following the immunizing injection is discussed.