Vaccine definition

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.

Any preparation of killed microorganisms, weakened viruses, etc. that is introduced into the body to produce immunity to a specific disease by causing the formation of antibodies.

The definition of a vaccine is an inoculation used to stimulate antibodies in your body so you will develop immunity against a certain disease.

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 to an individual stimulates antibody production or cellular immunity against the pathogen but is incapable of causing severe infection.

(computers) A software program designed to detect and stop the progress of computer viruses.

A preparation from the cowpox virus that protects against smallpox when administered to an individual.

(originally) Lymph, or a preparation of this, from a cowpox vesicle, containing the causative virus and used in vaccination against cowpox or smallpox.

(rare) Of cowpox or 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 is administered to prevent or treat infection by the pathogen and that functions by stimulating the production of an immune response.

A preparation from the cowpox virus that protects against smallpox when administered to an individual.