Based on the Canon of Medicine by Avicenna (980-1037), fever is defined as an abnormal heat ignited in the heart and spreads throughout the body via the arteries (1). Following the Galen theory about fevers (2), Avicenna describes three main types of fevers in relation with the three types of material structures in the body (2). According to the theory of "Natural bodily af-fairs" mentioned in ...
