What is the dose of vitamin A at 9 months –
**Core Concept**
Vitamin A supplementation is a crucial public health intervention to prevent vitamin A deficiency, which can lead to night blindness, impaired immune function, and increased mortality in children. The World Health Organization (WHO) recommends vitamin A supplementation for infants and young children in areas with high prevalence of vitamin A deficiency.
**Why the Correct Answer is Right**
The recommended dose of vitamin A for infants at 9 months is 100,000 IU (International Units) every 6 months. This dose is based on the child's weight and the severity of vitamin A deficiency in the population. The vitamin A supplementation is typically administered orally, and the dose is adjusted according to the child's age and weight. At 9 months, the child is considered a high-risk group for vitamin A deficiency, and the supplementation is essential to prevent deficiency-related complications.
**Why Each Wrong Option is Incorrect**
* **Option A:** This dose is not recommended for infants at 9 months.
* **Option B:** This dose is not correct for vitamin A supplementation in children.
* **Option C:** This dose is not the recommended dose for vitamin A supplementation at 9 months.
**Clinical Pearl / High-Yield Fact**
Vitamin A supplementation should be given only under the supervision of a healthcare provider, and the child should be monitored for any adverse effects, such as vomiting, diarrhea, or liver enzyme elevation.
**Correct Answer:** D. 200,000 IU.