One theory for why there is an education gradient in health outcomes is that more educated individuals more quickly absorb new health-related information. The measles, mumps, and rubella (MMR) controversy provides a case where, for a short period, some publicized research suggested that the particular childhood vaccine could have serious side-effects. As the controversy unfolded, uptake of the vaccine by more educated parents decreased relative to that of less educated parents, turning a positive education gradient into a negative one. We also consider the response in terms of uptake of other childhood vaccines and purchases of alternatives to the MMR.