An Osage County resident has measles, acquired from an out-of-state exposure, health officials say. Concern about measles, once thought eradicated in the United States, continues as kindergarten vaccination rates fall in Kansas. (Photo by Joshua Haiar/South Dakota Searchlight)TOPEKA — Measles, once thought successfully eradicated in the United States, returned to Kansas with a confirmed case Tuesday in an Osage County resident, health officials …