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BIOLOGY CH22 World of Microbes — Science STD 9 — Question

Tamilnadu BoardEnglish MediumSTD 9ScienceBIOLOGY CH22 World of Microbes1 Mark
Question
Define the following.

Vaccines

✓

Answer

Preparation of antigenic proteins of pathogens (weakened or killed) which on inoculation into a healthy person provides temporary/permanent immunity against a particular disease.

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