Question

how are vaccines made

Answer 1

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.

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Answer 2

A vaccine typically contain an agent that resembles a disease - causion microorganism and is aften made from weakened or killed forms of the microbe , it's toxins, or one of its surface protein.

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