| cowpox | A mild, eruptive skin disease of milk cows caused by cowpox virus, with lesions occurring principally on the udder and teats. Human infection may occur while milking an infected animal. (12 Dec 1998) |
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| cowpox virus | A species of orthopoxvirus that is the aetiologic agent of cowpox. It is closely related to but antigenically different from vaccina virus. (12 Dec 1998) |