The teams will work with local public health authorities to conduct contact tracing, and will distribute supplies as needed or requested by states, such as therapeutics and additional tests. 

The teams will also help augment staffing at local vaccination sites.

White House coronavirus coordinator Jeff Zients said the administration will also increase advertisements about the benefits of vaccinations in hot spot communities.

The federal government has relied on teams from agencies including the Department of Health and Human Services and the Federal Emergency Management Authority to help bolster vaccine distribution since Biden took office, with a focus on underserved communities. 

Centers for Disease Control and Prevention (CDC) Director Rochelle Walensky warned that the highly contagious delta variant is the most serious risk to unvaccinated communities. She said an estimated 25 percent of all infections nationwide are attributed to the delta variant which was originally found in India. 

"Looking across the country we have made incredible progress towards ending the pandemic," Walensky said. "However, looking state by state and county by county, it is clear that communities where people remain unvaccinated are communities that remain vulnerable."

Walensky said there are about 1,000 counties in the country that have vaccination coverage of less than 30 percent, primarily in the south, east and Midwest.

"In some of these areas we are already seeing increasing rates of disease. As the delta variant continues to spread across the country, we expect to see increased transmissions in these communities, unless we can vaccinate more people," Walensky said.

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