<s>[INST] What does it mean by high or low-grade? [/INST] How high a fever is does not necessarily indicate the severity of the illness causing the fever.  Our normal body temperature is around 98.6 degrees Fahrenheit.

Temperature between 98.8-100.6 is a low-grade fever and is not considered clinically significant although you may still have some symptoms and not feel well.
Temperature between 101-102 is considered a mild fever
Temperature between 102-103 is considered moderate and above 103 is high Source: HEALTH CATHOLIC EDU. Link: https://health.catholic.edu/self-help/fever.html. Field: Infectious Disease. Disease: Fever </s>