vaccinia, n.
a viral disease of cattle causing a mild skin disease affecting the udder; formerly used to inoculate humans against smallpox
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cowpox vaccinia
semantic pointers
hypernym
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
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vaccina vaccinia variola vaccina variola vaccine variola vaccinia