How 3 counties reached the highest COVID-19 vaccination rates in their states

Inside the vaccination efforts of three counties.

In Wyoming's Teton County, nearly 60% of residents are fully vaccinated -- almost double the statewide vaccination rate. It's an effort that has been noticed in the state, which has one of the lowest vaccination rates in the country and where several counties have fewer than 30% of their population inoculated, state data shows. "We have spoken to some of our other counties in Wyoming because they wanted to know what we were doing," Rachael Wheeler, the public health response coordinator at the Teton County Health Department, told ABC News. As the highly transmissible delta variant has quickly spreads throughout the United States -- now making up over 80% of new cases -- regions with high vaccination rates are expected to fare better, medical experts say.