In Mumps Outbreak, Most Were Vaccinated

The recommended two shots against mumps don’t always prevent the disease, a study suggests. In 2006, nearly 6,600 people became sick with mumps. Most cases were in eight Midwestern states. Most were college students. The study checked on their vaccination history. Of those who knew their history, 84% had had two shots. Experts said they didn’t expect immunity to fade so quickly, the Associated Press reported April 10. The study was done by the U.S. Centers for Disease Control and Prevention and state health departments. It was published in the New England Journal of Medicine.