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T1 CH6 Health and Hygiene — Science STD 7 — Question

Tamilnadu BoardEnglish MediumSTD 7ScienceT1 CH6 Health and Hygiene1 Mark
Question
What is a Vaccine?
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Answer

  1. A vaccine is a biological preparation that provides active acquired immunity to a particular disease.
  2. Vaccine (BCG, Polio, MMR) are given at early childhood to protect from other diseases.

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