vaccine

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.

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

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

Of or pertaining to cows; derived from cows: as, the vaccine disease, or cowpox.

Of or relating to vaccinia or vaccination.

The virus of cowpox or vaccinia, used in the process of vaccination as a preventive of smallpox.

In a general sense, the modified virus of any specific disease introduced into the body by inoculation, with a view to prevent or mitigate a threatened attack of that disease or to confer immunity against subsequent attacks.

Also vaccin.

Of or pertaining to cows; pertaining to, derived from, or caused by, vaccinia.