The following statements are true about DPT vaccine except :
**Core Concept**
The DPT vaccine is a combination vaccine that protects against diphtheria, pertussis (whooping cough), and tetanus. It contains inactivated or killed whole-cell pertussis antigens and is commonly administered to children in multiple doses.
**Why the Correct Answer is Right**
The DPT vaccine induces immunity against the toxins produced by the bacteria *Corynebacterium diphtheriae* (diphtheria), *Bordetella pertussis* (pertussis), and *Clostridium tetani* (tetanus). The vaccine stimulates the production of antibodies that neutralize these toxins, thereby preventing the diseases. The inactivated pertussis antigens in the DPT vaccine are derived from the whole-cell pertussis bacteria, which elicit a strong immune response.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided, but if you'd like to fill it, please provide the statement.
**Option B:** This option is not provided, but if you'd like to fill it, please provide the statement.
**Option C:** This option is not provided, but if you'd like to fill it, please provide the statement.
**Option D:** This option is not provided, but if you'd like to fill it, please provide the statement.
**Clinical Pearl / High-Yield Fact**
It's essential to note that while the whole-cell pertussis DPT vaccine is effective, it can cause side effects such as fever and local reactions. The acellular pertussis DPT vaccine, on the other hand, is associated with fewer side effects but may have reduced efficacy.
**Correct Answer:** A. (Please provide the correct answer text)