A mild, contagious skin disease of cattle, usually affecting the udder, that is caused by a virus. When the virus is transmitted to humans, as by vaccination, it can confer immunity to smallpox.
a viral disease of cattle causing a mild skin disease affecting the udder; used to innoculate humans against smallpox
a viral disease of cattle causing a mild skin disease affecting the udder; formerly used to inoculate humans against smallpox
