Routine Second dose of Measles vaccine is given to?
**Core Concept**
The second dose of Measles vaccine is given to provide long-term immunity against Measles, Mumps, and Rubella (MMR) infections. This vaccine is a live attenuated vaccine, which stimulates a strong immune response and provides protection against these viral infections.
**Why the Correct Answer is Right**
The second dose of Measles vaccine is administered at 16-18 months of age to ensure that the child has developed sufficient immunity against Measles, Mumps, and Rubella. This timing also helps to prevent outbreaks of these diseases in communities where vaccination rates are low. The immune response generated by the second dose is crucial in providing long-term protection against these viral infections.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the first dose of Measles vaccine is typically given at 9-12 months of age, not the second dose.
**Option B:** This option is incorrect because the second dose of Measles vaccine is not given at birth.
**Option C:** This option is incorrect because the second dose of Measles vaccine is not given at 5 years of age, which is more relevant to the administration of booster doses of other vaccines.
**Clinical Pearl / High-Yield Fact**
It is essential to note that the second dose of Measles vaccine should not be administered before the first dose, as this can lead to a weakened immune response. Additionally, children who have received a measles-containing vaccine should not receive a live attenuated vaccine for at least 28 days.
**Correct Answer: C. 16-18 months of age.**