cnn's senior medical correspondent elizabeth cohen has more. >> the incidence of diseases such as measles, mumps, and rubella are at an all-time low. >> reporter: so low, the health organization declared measles was eliminated in the united states. now cnn is first to report that the u.s. center for disease control and prevention says there's a reasonable chance the u.s. will lose its measles elimination status as early as october 1st. dr. william shaftner. >> losing the elimination of measles status is an embarrassment. >> reporter: so why did measles return? in part because some orthodox jews in new york refuse to vaccinate their children. outbreaks here have been going on for nearly a year now. >> if that continues to the one-year cutoff point, they take