Just want to add that once the child has had it they are more susseptable(sp) in getting it again. It is linked to the herpes virus and I have had I child in day care with it that got mouth herpies when her immun was down. The drs said it was due to her having a bad case of hand foot.. earlier. They can be off food, temp, and very misserable b4 and during the illness. Other ch get mild dose and barely show and signs. Very very common in day care centres and highly contageous for the littlies as they mouth everything/toys. One of the ways it is passed on.