I haven't read any of the replies, but I personally don't think there is a connection. Both my children are immunised.

DS1 didn't receive the birth dosage of Heb B but has had the rest, DS2 has had all (so far).

DS1 has a range of issues including ASD, hearing loss, sensory processing disorder, developmental delays, etc. DS2 is neuro-typical and other than some mild developmental delays is doing really well. DS1 displayed signs of being 'different' from a very early age, he has always had the traits that got him the Autism diagnosis it just happened that by about 18m-2yrs (around the same time as his MMR) his traits become more profound.

As far as I'm concerned, DS1's issues are related to his pregnancy, birth and prematurity complications not because he was immunised. I hope that helps.