Booster shot
Booster shot
A booster shot (pronunciation: /ˈbuːstər ʃɒt/) is a dose of a vaccine administered to an individual who has previously been vaccinated. Booster shots are given to re-expose the individual's immune system to the immunizing antigen, in order to stimulate the immune system and increase antibody levels.
Etymology
The term "booster shot" originates from the English words "boost", meaning to help or encourage, and "shot", a colloquial term for an injection. It is so named because it boosts or enhances the effectiveness of the initial vaccination.
Related terms
- Vaccine: A biological preparation that provides active acquired immunity to a particular infectious disease.
- Immune system: The bodily system that protects the body from foreign substances, cells, and tissues.
- Antigen: A substance that induces an immune response in the body, especially the production of antibodies.
- Antibody: A blood protein produced in response to and counteracting a specific antigen.
See also
External links
- Medical encyclopedia article on Booster shot
- Wikipedia's article - Booster shot
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