When scientists developed the mumps vaccine in 1967, cases of the disease plummeted by over 99%. However, mumps cases do still occur and have been on the rise since 2006, mostly among college students.
Now a new study from the U.S. Centers for Disease Control and Prevention (CDC) has found from 2007 to 2019, one-third of reported mumps cases in the United States occurred in children and teens, most of whom had been vaccinated.