Over 1000 people have been diagnosed as having mumps.  Keep a watch on this. And it is spreading. Of most concern would be people aged 35-45 just because the vaccine came out in 1967, so many people in that age range didn't get vaccinated and also managed not to get it.

It is more an annoying disease than anything else, but can have some unpleasant possible side effects such as:  hearing loss, meningitis and fertility-diminishing swollen testicles. The common side effects are: fever, headache and swollen salivary glands under the jaw.