Which of the following explains why children must be vaccinated for communicable diseases, like measles?
a) they are typically exposed to less pathogens than adults.
b)the immunity they receive in the womb from their mother is temporary.
c)they lack an immune system at such a young age.
d)the antibiotics used to treat infections cause too many side effects in children.

Option B

Explanation: The children must be vaccinated for communicable diseases, like measles. This is because the immunity that is passed from the mother to child is passive immunity. This is not a permanent immunity.

The immunity from the mother is transferred to the child by placenta when the child is in embryonic stage and some by the breast feeding.

Both kind of the immunity is temporary and does not lasts for long to prevent from the further infections or diseases in future.

So, a child must be vaccinated for communicable diseases like measles.

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