They don't give kids autism! 
Just putting that out there.

Parents who don't immunise their kids out others at risk. Not to be a bitch about it. For some reason I'm not vaccinated against TB, which is mental, so if I caught the bugger and walked into another community, spread my germs, BAM! TB outbreak. Of course much more technical and scientific than that. 

Then again, superbugs. Eh, they'll happen anyway