Signs are improving for the measles outbreak that started in Colter Bay concessionaire employee housing in Grand Teton National Park. Teton County commissioners on Tuesday voted to rescind an emergency declaration they issued on July 13. “That means the Teton County outbreak is over.” “There’s definitely still the potential for people with measles to come into Teton County and introduce it.” All known cases in Teton County, Wyoming were in unvaccinated adults.