Bloomberg reports that the gap between the most- and least-vaccinated counties in the United States is widening, with some rural counties yet to reach even a 30% first-dose vaccine threshold.

In the least vaccinated group of counties, many of which are in the South and Central regions of the U.S., less than half as many people have gotten at least one Covid vaccine dose as in the most vaccinated counties in the cities and on the coasts. Those less vaccinated places are not catching up, either. The gap between more- and less-vaccinated counties is expanding, and the trailing counties are far below levels needed to halt future waves of infection. 

In the bottom fifth of counties — which tend to be more rural, more poor, less educated and more likely to lean politically to the right — only 28% of people have received a first dose of a vaccine, on average, and 24% are fully vaccinated.