ATI Proctored Community Health Related

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At what age is the first dose of the MMR vaccine typically administered to a child?

  • A. At birth
  • B. 6 months
  • C. 12 months
  • D. 18 months
Correct Answer: C

Rationale: The correct answer is C: 12 months. The first dose of the MMR vaccine is typically administered at 12 months of age because this is when a child's immune system is more developed to respond effectively to the vaccine. Administering it earlier may not provide adequate protection. Choice A (At birth) is incorrect because newborns have maternal antibodies that can interfere with the vaccine's efficacy. Choice B (6 months) is too early as infants need time to develop their immune system. Choice D (18 months) is also incorrect as delaying the vaccine may leave the child vulnerable to diseases like measles, mumps, and rubella.