How does a vaccine work? a. it kills viruses b. it protects cells from viral infection c. it prepares the immune system to recognize viruses d. it prevents viruses from being transmitted from an infected

How does a vaccine work?

a. it kills viruses
b. it protects cells from viral infection
c. it prepares the immune system to recognize viruses
d. it prevents viruses from being transmitted from an infected person

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How does a vaccine work? a. it kills viruses b. it protects cells from viral infection c. it prepares the immune system to recognize viruses d. it prevents viruses from being tr…

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