Question

what is the vaccine?

Answer 1

Answer:

vaccine is composed of weakened or dead virus on which our immune cells can act upon and develop immunity against that disease.

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Answer 2

Explanation:

A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease. A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe, its toxins, or one of its surface proteins.