How many degrees is considered a low fever for a 3-year-old baby?

Patient's question:

No

Doctor's answer:

The normal rectal temperature of a healthy human body averages 37.3°C, close to the deep blood temperature. Oral temperature is lower than rectal temperature by 0.2°C to 0.3°C, averaging about 37°C. Axillary temperature is even lower than oral temperature by 0.3°C to 0.5°C, averaging about 36.7°C.