In the world of medicine, more specifically infectious diseases, it ish hard to imagine (or experience) the chills without its good friend fever rearing its ugly face. By definition, a fever is an elevation in body temperature or simply, a raised core temperature. Typically, the human body will sit at a resting oral temperature of 98.6 Fahrenheit (37 Celsius).
While fever is incredibly common for even non-serious infections and health issues, a fever does become a significant concern when it reaches above 100.4 F (38 C), which is the temperature considered to be a fever by medical professionals. However, this doesn’t answer why a fever occurs in the first place. A fever serves the purpose of being one of the bodies many natural defenses against bacteria and viruses that cannot live at an elevated temperature.