With the heightened flu season upon us please take time to review the District Fever and Exclusion Guidelines. A fever is a physiological response to inflammation or infection, illness or injury, or the result of heat exposure. While not always cause for alarm, it is sometimes the sign of a serious problem. Left untreated, a fever could be uncomfortable, cause dehydration and stress the cardio-vascular system. An oral temperature* of over 100.4 degrees Fahrenheit is considered a fever.