- any preparation used as a preventive inoculation to confer immunity against a specific disease, usually employing an innocuous form of the disease agent, as killed or weakened bacteria or viruses, to stimulate antibody production.
- the virus of cowpox, used in vaccination, obtained from pox vesicles of a cow or person.
- a software program that helps to protect against computer viruses, as by detecting them and warning the user.
- a suspension of dead, attenuated, or otherwise modified microorganisms (viruses, bacteria, or rickettsiae) for inoculation to produce immunity to a disease by stimulating the production of antibodies
- (originally) a preparation of the virus of cowpox taken from infected cows and inoculated in humans to produce immunity to smallpox
- (modifier) of or relating to vaccination or vaccinia
- computing a piece of software designed to detect and remove computer viruses from a system
“matter used in vaccination,” 1846, from Latin vaccina, fem. of vaccinus “pertaining to a cow” (see vaccination).
- A preparation of a weakened or killed pathogen, such as a bacterium or virus, or of a portion of the pathogen’s structure that upon administration stimulates antibody production against the pathogen but is incapable of causing severe infection.
- A vaccine prepared from the cowpox virus and inoculated against smallpox.
- A preparation of a weakened or killed pathogen, such as a bacterium or virus, or of a portion of the pathogen’s structure, that stimulates immune cells to recognize and attack it, especially through antibody production. Most vaccines are given orally or by intramuscular or subcutaneous injection. See Note at Jenner.
A substance prepared from dead or living microorganisms that is introduced into the body through inoculation. The vaccine causes the development of antibodies, which produce immunity to the disease caused by the microorganism.