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Byju's Answer
Standard VII
History
Who Was Shivaji?
Explain brief...
Question
Explain briefly, the role of the following health aids:
(c) Vaccines
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Solution
They are the substances that are administered in the body to provide active immunity.
These are dead or weakened germs. E.g. DTP, OPV.
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Who Was Shivaji?
Standard VII History
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