vaccinia, vaccina, variola vaccine, variola vaccinia, variola vaccina -- (a local infection induced in humans by inoculation with the virus causing cowpox in order to confer resistance to smallpox; normally lasts three weeks and leaves a pitted scar)
cowpox, vaccinia -- (a viral disease of cattle causing a mild skin disease affecting the udder; formerly used to inoculate humans against smallpox)
(TTS Sound)
