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Aids to Health — BIOLOGY STD 9 — Question

ICSE BoardEnglish MediumSTD 9BIOLOGYAids to Health2 Marks
Question
Define the following:
Vaccine
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Answer

Vaccine:A vaccine is a biological preparation of a weakened or killed pathogen (disease causing microbes) which stimulates the formation of antibodies and develops immunity against a particular disease.

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