If a 11-month old child has received two doses of DPT and polio, comes for fuher immunization after 5 months of the last dose, what should be done ?
**Core Concept**
The concept being tested is the timing and schedule of booster doses for childhood vaccinations, specifically the DPT (diphtheria, pertussis, and tetanus) and polio vaccines. This requires an understanding of the recommended immunization schedules and the principles of booster doses.
**Why the Correct Answer is Right**
The recommended schedule for DPT and polio vaccines involves administering the first dose at 6 weeks of age, followed by booster doses at 10-14 weeks, 16-24 weeks, and 12-18 months of age. If a child has received two doses of DPT and polio at 2-3 months and 4-5 months of age, they are due for a booster dose at 9-12 months of age. Since the child in this case received the last dose at 4-5 months and is now 11 months old, a booster dose is indeed due. This booster dose is crucial for maintaining immunity against diphtheria, pertussis, and polio.
**Why Each Wrong Option is Incorrect**
**Option A:** This option may imply that no further action is needed, which is incorrect as the child is due for a booster dose.
**Option B:** This option may suggest administering a new series of doses, which is not necessary as the child has already received two doses.
**Option C:** This option may imply that the child is too old for a booster dose, which is incorrect as the child is still within the recommended age range.
**Clinical Pearl / High-Yield Fact**
It's essential to follow the recommended immunization schedule to ensure timely administration of booster doses, which helps maintain immunity against vaccine-preventable diseases.
**Correct Answer: D**