The Infectious Disease Society of America says there have been “no deaths related to the measles, mumps and rubella vaccine in healthy individuals.” (Since the 1970s, the measles vaccine has been given in a combination shot with mumps and rubella to minimize the number of injections kids get.)

Cases in the ongoing measles outbreak have risen to 258 across Texas, New Mexico and Oklahoma, and state health departments are urging more people to get the measles-mumps-rubella vaccine.