I have decided to have the MMR jab for my daughter, and do not wish to start another debate over the pros and cons, whilst respecting everyone else's decision. But I am unsure whether it is okay to leave it til she is 15 months, which is easier for us as far as holidays etc are concerned...I know the official guidance is 13 to 15 months, but would appreciate some sensible MN advice on the timing please. Thanks!