This article says that we're experiencing the worst mumps outbreak in 20 years and the fear is a severe case can cause sterility. It is thought that two airplane passengers unwittingly spread the mumps as a result of airplanes using recycled air.
http://www.theglobeandmail.com/servlet/story/LAC.20060425.HSHAPIRO25/TPStory/specialScienceandHealth/columnists
It was really amusing last night being a roomful of people who think just like we do about Lindsey Graham. I thought I was at a freep.
"fear is a severe case can cause sterility", that has always been a worry to the medical group. When mumps "go down" it causes a problem and it is very uncomfortable.