Correct Answer: C

Rationale: The Measles, Mumps, Rubella (MMR) vaccine is an example of a live attenuated vaccine because it contains weakened versions of the viruses that cause measles, mumps, and rubella. These weakened viruses can replicate in the body to stimulate an immune response without causing the diseases themselves.

Correct Answer: B

Rationale: The WHO's Health For All strategy focuses on achieving a level of health that allows individuals to lead socially and economically productive lives, emphasizing overall well-being beyond just physical health. This approach aims for a holistic improvement in health outcomes rather than just providing free healthcare or focusing solely on increasing healthcare infrastructure or workforce.

Correct Answer: B

Rationale: A population pyramid is a graphical illustration that shows the age and sex composition of a population. It displays the percentage or number of individuals in different age groups and gender categories. This tool helps in understanding the demographic structure of a population, including aspects such as birth rates, death rates, life expectancy, and dependency ratios.

Correct Answer: B

Rationale: The primary benefit of administering Vitamin A to children is to boost the immune system. Vitamin A supplementation is crucial for maintaining a strong immune system and preventing complications such as blindness in children.

Correct Answer: B

Rationale: A previous allergic reaction to the vaccine is a contraindication for the administration of live vaccines. This is because individuals who have had a previous allergic reaction to a vaccine are at higher risk of developing a severe allergic reaction with subsequent doses. It is crucial to identify and avoid administering live vaccines to individuals with a history of allergic reactions to prevent potential adverse events.