Toxoid vaccines consist of the illness-causing toxins that are released from pathogens, as opposed to the pathogens or parts of the pathogens themselves.
Toxoid vaccines may require booster shots.
Since toxoid vaccines consist of antigens from toxins produced by pathogens and not the pathogens themselves, there is no risk of reversion to virulent form.
Corynebacterium diptheriae vaccine is a toxoid vaccine and part of the combined DTaP/TDaP vaccine, which is given to prevent diptheria.
The tetanus vaccine is a toxoid vaccine. It is also a component in the combination TDaP vaccine.
The pertussis vaccine is a toxoid vaccine and part of the TDaP/DTaP vaccine.
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