I have noticed that when my son is ill, his temperatures tend to be high (39-40 degrees several times a day), comapared to his siblings who may reach that temperature a couple of times during the course of an illness, but often have temperatures around 38 degrees.
Would this worry you? I guess I'm wondering whether there is a problem with white blood cells.
PS: I know some people disagree with taking temperatures at all - but I do so as having given up the habit, I was immediately asked what temperature one of my children had been by the Dr