Introduced for mass immunization in the 1920s, vaccines against diphtheria are among the oldest and safest vaccines known. The basic principle of their production is the inactivation of purified diphtheria toxin by formaldehyde cross-linking, which converts the potentially fatal toxin in a completel...
ORGANISM(S): Corynebacterium diphtheriae NCTC 13129 Clostridium tetani E88