Valcri Medical

"As most school children can tell you, the average human body temperature is around 37 degrees Celsius (or 98.6 degrees Fahrenheit). But experts says that that perfect temperature comes with a full degree of variation, both higher and lower, to account for a variety of factors including a person's age, what time of day it is, and their physical activity level at the exact time their temperature was taken." https://www.popsci.com/fever-causes-infection -2

Does a fever always mean you have an infection?