Measles vaccination to all 9 months – 14 years children is a pa of which WHO strategy?
**Core Concept**
Measles vaccination is a crucial component of global efforts to control and eliminate measles, a highly infectious viral disease. The World Health Organization (WHO) has developed strategies to achieve this goal through targeted vaccination programs.
**Why the Correct Answer is Right**
The correct answer is part of the WHO's Expanded Program on Immunization (EPI), specifically the strategy to achieve measles elimination. This strategy involves vaccinating all children with two doses of measles-containing vaccine (MCV) at 9-12 months and a second dose at 16-18 months, with a catch-up campaign for children aged 9 months to 14 years. The goal is to create a population immunity of at least 93% to prevent measles outbreaks. This strategy is based on the principle of herd immunity, where a sufficient percentage of the population is immunized to prevent the spread of the disease.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify the age range for the catch-up campaign, which is a critical component of the measles elimination strategy.
**Option B:** This option is incorrect because it does not mention the two-dose schedule for measles vaccination, which is essential for achieving herd immunity.
**Option C:** This option is incorrect because it does not specify the target age range for the catch-up campaign, which is crucial for achieving population immunity.
**Clinical Pearl / High-Yield Fact**
The measles elimination strategy relies on achieving a high population immunity level, which is critical for preventing measles outbreaks. The two-dose schedule for measles vaccination is essential for achieving this goal, and the catch-up campaign for children aged 9 months to 14 years is a critical component of this strategy.
**Correct Answer:** B. Measles elimination strategy.