Diphtheria vaccines are an example of:
Correct answer: B. Toxoid vaccine
- A. Inactivated vaccine
- B. Toxoid vaccine
- C. Subunit vaccine
- D. Live, attenuated vaccine
Explanation
Toxoid vaccines, such as those for diphtheria and tetanus, contain inactivated toxins produced by bacteria. These vaccines do not target the bacteria but rather the harmful effects of the toxins they produce. Inactivated vaccines, however, use killed pathogens, primarily viruses, to elicit an immune response. Subunit vaccines use fragments of the pathogen, while live, attenuated vaccines use weakened forms of the whole virus or bacteria. The diphtheria vaccine specifically uses a toxoid to neutralize the effects of the toxin produced by the bacteria.
This question appeared on the ETEA MDCAT 2019 paper, which you can sit online with every answer explained.
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