Illnesses are acquired.
That's not a very strict definition, but it's as good a rough guide as I can give you off the top of my head.

Autism and the like are the result of congenital differences in the physical structure of the brain, I believe.
( Moon Girl Technologies horrendous beanbag, Mon 12 Apr 2010, 18:57, archived)

Thank you.

( Neptune A dole queue dosser and foul mouthed chav., Mon 12 Apr 2010, 19:15, archived)