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Define different types of antigenic agents comprise vaccines

What are the different types of antigenic agents which might comprise vaccines?

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Vaccines can be comprised of dead agents of disease, of inactivated agents of disease, of in-activated toxins or of fragments of infectious agent.

Instances of various vaccines and their kind of antigenic agents are: BCG, inactivated tuberculosis bacilli; antitetanic vaccine or inactivated toxin; antidiphtheric or inactivated toxin; antipolio Salk or dead poliovirus; antipolio Sabin, attenuated (or inactivated) polio virus.

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