what age group is most affect by mumps
Mumps was a common childhood illness in the United States until 1967, when a vaccine was made available to the public. Before the vaccine, most mumps infections occurred in children under the age of 15, and 5- to 9-year-olds were the most frequently affected age group.In the twenty-first century, many cases are diagnosed in young adults who have not been immunized.ymptoms usually appear within 14 to 25 days after exposure to the virus. Only 30 to 40 percent of people who become infected with the mumps virus have the swelling in the jaw area that most people associate with mumps.