wouldn't surprise me
http://mysterytopia.com/2008/08/parasit ... ttens.html
this article isnt the 1 i read but covers the gist of it.
http://www.bbc.co.uk/news/science-environment-12275979
this article could have a virus or bacteria that could either save humanity by curing cancer or aids or kill us all.
Parasites are a powerful bunch using both chemical and biological weapons at their disposal. They come in a variety of species and all it takes for 1 to mutate/evolve to a major problem. e.g. FIV Feline immunodeficiency virus, jumped from a unique strain of another "IV" which is probably where HIV jumped from.
all it takes is nature and time or an eejit scientist.
just my two cents.