Nicky - Apparently it can take up to 21 days to show any symptoms if they catch it, and I figure you can't put your life on hold for almost a month... But then I guess I might just feel that way because of my opinion towards ds catching chickenpox (I'd prefer him to catch it young and develop natural immunity than to catch it when he's older). I wouldn't purposely put him in a situation where I know he is definitely being exposed to the virus, but I wouldn't get angry if he got it from another kid that didn't have any symptoms yet.