Fever o Normal body temperature 口37C( set point D Circadian variation <10C: 363-37. 20C o rectal T 0.4C>oral T 0. 40C> axillary T ● Definition of fever O An elevation of core body temperature above the normal rangeFever  Normal body temperature:  37oC (set point)  Circadian variation <1o C ：36.3 - 37.2oC  rectal T 0.4oC > oral T 0. 4oC > axillary T  Definition of fever:  An elevation of core body temperature above the normal range