Three horses all on a single premise in Cochise County, Ariz., remain the only horses in the country currently diagnosed with vesicular stomatitis (VS) virus. VS is a disease that causes blister-like lesions in the mouth and on the dental pad, tongue, lips, nostrils, hooves, prepuce, and teats of livestock in the southwestern United States. "Arizona hasn't had a case since 2005," repor

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