My head tells me there is no risk, but when my seven week old son is due for his MMR he will be having separate jabs.
My five year old daughter had the MMR, and although she is a happy, emotionally secure, bright, normal five year old, when she was at nursery it was flagged up she might have Asperger's.
Now, ignoring the fact that having done an awful lot of research on this 'syndrome', I'm pretty cynical about it existing at all (for Asperger's Syndrome, read 'foibles' or, if you like, idiosyncracies - my daughter's signs of Asperger's are that she's pretty shy (so was I at her age), it takes a long time for her to feel comfortable around her peers (same as me to this day), she enjoys imaginitive play on her own (so effing what), she is very bright (well good, I wouldn't want he being an idiot) plus a few other things too things too trifling to even bother mentioning). I should mention she is very popular with her peers and has lots of friends, so is not a loner, which is, apparently, another 'sign'.
Her nursery (WTF business is it of a load of glorified babysitters to 'diagnose' such things) have completely spoiled some aspects of my daughter's growing up for me. She enjoys jigsaw puzzles, and is extremely good at them, managing to complete jigsaws aimed at children much older than her, but as opposed to being proud of this, I automatically think (and I know it is wrong, but I simply can't help it) that is this ability because of 'Asperger's'.
Sorry, I've digressed - as autism is more prevelant in boys, I will not be taking any chances and he will be having the single jabs.
This is nobody's business other than ours - he will be jabbed, just not with the triple vaccine.