probably not. in the first place your pediatrician would have advised you whether or not you should be concerned. obviously he or she did not. second receiving an extra immunization dose isn't really considered a health hazard. your baby probably will exhibit the usual symptoms of having been vaccinated: irritability possibly an elevated temperature temporarily. but these symptoms should pass within a couple of days as normal. the varicella vaccine is not a "live" vaccine meaning it does not contain a live virus that can infect your baby. the only likely side effect of receiving a double dose is that it will rev up your baby's immune system a little more vigorously. if your baby has any abnormal symptoms after the weekend give your pediatrician a call for peace of mind. but i don't think you'll have anything to worry about. hope this helps!
dr accidentally gave our 12 mo old a double dose of varicella. should we be concerned?