Question

How is a vaccine produced?

Answer 1

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A vaccine is a biological preparation that provides active acquired immunity to a particular 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.

Answer 2

vaccine is made from a microorganism
when the microorganism is injected into our body it becomes activate when another disease enter into body