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cowpox, vaccinia | a viral disease of cattle causing a mild skin disease affecting the udder; formerly used to inoculate humans against smallpox | |
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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 |