Question

multiple - choice question
what is an mrna vaccine?
a novel form of vaccine that teaches your cells how to make something your immune system can learn from.
a type of vaccine that was produced many years ago but has not been shown to be effective for prevention on infection.
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Explanation:

mRNA vaccines teach cells to make something for immune - system learning. They are a novel type and effective.

Answer:

A. A novel form of vaccine that teaches your cells how to make something your immune system can learn from.