This photo taken Feb. 14, 2017, shows Dr. Mary Wood, Wyoming's state wildlife veterinarian, feeding a young elk at the Tom Thorne and Beth Williams Wildlife Research Center in Sybille Canyon, near Wheatland, Wyo. The elk have been naturally infected with chronic wasting disease but carry a special type of genetics that could keep them alive longer than other elk. (Christine Peterson/The Casper Star-Tribune via AP)
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