On top of all that, those guidelines are just that ... guidelines. I'm one of many, many people whose "normal" temperature is several tenths of a degree below what is considered normal. I can be running a temperature, and actually feel pretty crappy and have a "normal" temperature.
I understand that that is not really uncommon because "normal" anything is just the range in which MOST people fall ...
I understand that that is not really uncommon because "normal" anything is just the range in which MOST people fall ...