Question #6432865Single Choice

Biology

Question

A child who has never been vaccinated contracts measles. Several days after exposure, they develop a fever, cough, and a red rash. Why did the child’s immune system not immediately prevent the infection?

Options

The child’s immune system had no memory cells against measles, so it had to mount a primary immune response.

The measles virus blocks all immune responses, making it impossible to fight off.

The child’s immune system was permanently weakened due to the infection.

The immune system does not recognize viruses, only bacteria.

Answer & Analysis

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