Medical workers with Delta Health Center prepare to vaccinate people in Leland, Miss., last week. In some places, rural hospital workers have been slow to get the vaccine themselves.

LELAND, MISSISSIPPI – APRIL 29: Medical workers with Delta Health Center prepare to vaccinate people at a pop-up COVID-19 vaccination clinic in a rural Delta community on April 29, 2021 in Leland, Mississippi. An estimated 23 percent of Mississippians are fully vaccinated against COVID-19, and the Mississippi State Department of Health has reported a total of 334 new cases with the numbers currently trending up. Mississippi, a southern state with pockets of entrenched poverty, has struggled to vaccinate residents in remote areas who may not have access to the internet or transportation. (Photo by Spencer Platt/Getty Images)