write about vaccine
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A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease. A vaccine typically contains a biological preparation from disease-causing microorganism, or since the beginning of the 21st century, made synthetically that resembles it
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1
Answer:
A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease. A vaccine typically contains a biological preparation from disease-causing microorganism, or since the beginning of the 21st century, made synthetically that resembles it.
Explanation:
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