Last Friday my son had the first dose of the chickenpox vaccine (privately). He has been under the weather but hasn't had any spots as yet. I know you can get a mild strain as it's a live vaccine. However I have come up in some very itchy spots in the last day or so!! I only had it very mildly as a child (the virus itself). Could he have given it to me, is that possible? I'm a bit worried mainly as I have a heavily pregnant colleague 