How does a vaccine protect a person?
Answer and explanation
Correct answer: C. It exposes the immune system to an antigen and creates memory cells
- Step 1: A vaccine contains a harmless form of an antigen. Step 2. The body builds a response and memory cells for a faster reaction later. Answer: it creates memory cells. Why not the others: ready-made antibodies are passive immunity, and vaccines do not edit DNA.
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