Since you don’t give credence to Natural News, how about the following one which was Natural News’ source.
http://www.courthousenews.com/2012/06/27/47851.htm
Natural News cited their source in the article. This was not their bias or slant on this factual information.
Their bias (and insanity) is apparent from this...
“vaccines are actually formulated to keep the outbreaks going”
Can you defend that bit of insanity?
I think it would be pretty apparent if a significant percentage got Mumps and spread it after receiving an inoculation against Mumps - but then again I am not a whack job insane loon with an agenda against actual medicine of proven efficacy based upon known molecular interactions.