One of my twins had a reaction to the measles injection at 12mths, so when he had the chicken pox one 2 weeks ago I was waiting for the spots to come out. So far nothing as yet...

I know with the measles one in about 3% of cases a child will get the rash without actually being contagious (even though it is a live vaccine), but not too sure out Chicken Pox as the infectious part is when the spots start to 'scab;. Fingers crossed it is just a mild reaction and not Chicken Pox.