I just wanted to add that strep throat is only contagious by saliva, meaning they need to kiss, share a drink or food, or SC needs to cough right at your child. My son(no CF) is 9 and has had strep throat 2 times without Maggie getting it. Also, once she's on antibiotics, which she should be if she truly has strep she is no longer contagious after being on the antibiotics for 48 hours. So, I guess strep is ok but like Momma first posted the SC should actually see a doctor cause obviously you need to treat strep. If she's sick with a virus and has a temperature, maybe it is in the best interest of the SC not to travel and reschedule so she feels better and can enjoy her visit. If it's just a cold , I say let her visit.