i know this has probably been done a million times before but i got a reminder card in post for the twins mmr booster jag. im unsure what to do about dd4 as shes got developmental delays and i want to avoid making her worse, i always thought the jag was safe , but best mate is insistant that dd4 was" normal " before her mmr.to be honest i cant remember it was so long ago. so what do we do? jag or no jag?