My two year old has just had what we think is chickenpox. Couldn't get a doctor appointment to check, as they had none on the day. His spots are all scabby and healing nicely, so that's all good. However, I also have a 5 year old who I don't think has ever had it, and we were due to go to my sister's for Christmas. She is over 20 weeks pregnant, and has never had chickenpox. My 5 year old shows no symptoms, but I have read that the virus can take up to 3 weeks to show. Any advice? Do we just cancel Christmas? Can we get her checked for the virus now? The kids are going to be devastated if we cancel everything (and so am i).