1,000 counties within the U.S. have vaccination protection of lower than 30%

Members of FEMA greet the public as they make their way into the high school to be vaccinated at a FEMA run mobile Covid-19 Vaccination clinic at Biddeford High School in Bidderford, Maine on April 26, 2021. clotting.

Joseph Prezioso | AFP | Getty Images

About 1,000 counties in the United States have vaccination coverage of less than 30%, the director of the Centers for Disease Control and Prevention said Thursday.

The counties in question are mostly located in the Southeast and Midwest and are most vulnerable to Covid infection, according to CDC director Dr. Rochelle Walensky. The agency is already seeing increasing rates of disease in these counties due to further spread of the more transmissible delta variant, Walensky said.

The delta variant currently makes up about 25% of sequenced new cases in the U.S., and officials say they expect it to become the dominant strain in the country, eclipsing the currently dominant alpha variant.

In some counties, delta variant rates are as high as 50%, according to the CDC. “We expect to see increased transmission in these communities unless we can vaccinate more people,” Walensky said.

Zip codes with the highest rates of vaccine hesitancy are located in states like North Dakota, Idaho and Alabama, according to the Institute for Health Metrics and Evaluation, an independent global health research center at the University of Washington.

“Preliminary data over the last six months, suggest 99.5% of deaths from Covid-19 in the states have occurred in unvaccinated people … the suffering and loss we are now seeing is nearly entirely avoidable,” Walensky said.