Vaccines are a special preparation of antigenic material (live or inactivated) that are used to stimulate the development of antibodies, to produce immunity against a specific disease.
Vaccines can be produced by making bacteria and viruses nonpathogenic, under conditions that make them lose their virulence but not their antigenic nature. They won’t cause disease but are able to stimulate the immune system to produce antibodies against a particular organism.
See also
- bacterial vaccines
- toxoids
- viral vaccines
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