From Citizendium - Reading time: 1 min
The normal human body temperature is considered 98.6 degrees F (37 C) although recent studies suggest it may acutally be 98.2. Older people may run slightly lower normal body temperatures too. Determining fever is now based on time thresholds based on time of day.[1][2]
Regulating the body temperature is a series of neural feedback mechanisms operated primarily through the hypthalamus. [3]