According to the universal immunization schedule, which vaccine is not given by 6 weeks of age?

Appeared in: Raj. CHO - 2023

Explanation

The Measles vaccine is administered as the first dose of Measles-Rubella (MR) vaccine between 9 to 12 completed months of age.
This timing is crucial because maternal antibodies present in the infant's blood before 9 months can neutralize the live attenuated virus in the vaccine, rendering it ineffective.
Therefore, the measles vaccine is not administered at birth or by 6 weeks of age.

Option B: OPV is incorrect because its vaccination schedule starts at birth (zero dose) and the first primary dose is given at 6 weeks.
Option C: Hepatitis B is incorrect because a birth dose is given within 24 hours of birth, and subsequent doses are administered at 6, 10, and 14 weeks.
Option D: BCG is incorrect because it is administered at birth, which is before the 6-week mark.

Visual 1: Infographic - A color-coded chart of the National Immunization Schedule (NIS) for India, clearly showing the timeline from birth to 16 years. This helps in quick recall of vaccine schedules.
Visual 2: Diagram - An illustration showing how maternal antibodies can interfere with the measles vaccine if given too early, explaining the 'window of vulnerability' and the rationale for the 9-month schedule.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Knowledge of the National Immunization Schedule (NIS) in India, specifically the timing of infant vaccinations as background academic context rather than a clinical decision trigger.
Adhering to the immunization schedule is a critical nursing responsibility to ensure children are protected against vaccine-preventable diseases and to maintain herd immunity within the community.
Nurses play a vital role in educating parents about the importance of timely vaccination, addressing vaccine hesitancy, and explaining the reasons for the specific timing of each vaccine, such as the measles vaccine.
What if? If a 9-month-old infant comes for vaccination but has a mild cough and cold without fever, the measles vaccine should still be administered. Minor illnesses are not a contraindication for vaccination.

How to Approach the Question

First, identify the core of the question: it asks which vaccine is NOT given by a specific age (6 weeks). This is a negative-framing question.
Second, recall the National Immunization Schedule for infants.
Evaluate each option against the 6-week timeline:
Is Measles given by 6 weeks? No, it's given at 9-12 months.
Is OPV given by 6 weeks? Yes, at birth and 6 weeks.
Is Hepatitis B given by 6 weeks? Yes, at birth and 6 weeks.

Concept Tested & Keywords

Concept Tested: Knowledge of the National Immunization Schedule (NIS) in India, specifically the timing of infant vaccinations.
Stem keywords: universal immunization schedule, vaccine, 6 weeks of age
Lead-in keywords: not given
Negative lead-in flag: Question is negatively framed

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Practise the full Raj. CHO - 2023

Attempt every question from this paper in a timed mock, then review the full solution for each one.