The current surge in COVID-19 in the U.S. is being propelled by the more virulent delta variant alongside regions of the populace with low vaccination rates. Dr. Amesh Adalja, infectious disease expert, spoke to Cheddar's News Wrap about the worry combination leading to more hospitalizations. "This is all tied together: the more contagious variant, we have low vaccination rates, and those low vaccination rates are clustered in certain southern states, that's what's happening," he said. "That's why COVID now has become a very regional problem."