Mumps is commonly vaccinated against when children are very young. It’s one of the Ms in the MMR vaccine.
Up here kids are not permitted to go to school without it. There’s some exceptions but they’re, in practice, very difficult to secure.
Most parents still get their kids vaccinated. You hear about the few oddballs that don't when their kids get sick and it's trumpted all over the news as if it's a new pandemic.