what is vaccination ? explain the different types of vaccine
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A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease.[1] A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe, its toxins, or one of its surface proteins.
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Vaccine: A product that stimulates a person's immune system to produce immunity to a specific disease, protecting the person from that disease. Vaccines are usually administered through needle injections, but can also be administered by mouth or sprayed into the nose.
Types of Vaccines:
- Live attenuated vaccines.
- inactivated or dead vaccines.
- subunit vaccines.
- protein vaccines.
- pure polysaccharide vaccines.
- Nucleic acid-based vaccines.
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