JOHNSTON — Jonathan Whitfield, a pastor at Corinthian Baptist Church in Des Moines, recalled the ice cream truck that would come to neighborhoods with all manner of sweet treats for children. He said it was especially great for families who otherwise may have had a difficult time getting to the store.That’s the same spirit, Whitfield said, behind an effort to encourage and help Central Iowa minorities to receive the COVID-19 vaccine.“Somebody might have thought that maybe if I just be intentional about bringing the ice cream to the neighborhood, I’ll be able to bring all of those who might want it out of their homes and they will come to the truck,” Whitfield said.