my girls had a cold at the 12 month booster jab too and they said that they can have it as long as they had no tep, which they didnt but the nurse also said that they feel a bit more rotten than normal from if they didnt have a cold.. we were meant to have mmr jab this week but brianna had a very weird viral infection, no temp but had extrely bad hievs and the doctor said that she was to no way have it, so i didnt take tatum, as i never no if they are both going to get what the other has. so we are having it next week, my girls could really do with out any side effects as we are always ill at the moment and its driving me nuts