<unk>  is a continuous or fluctuating<unk>  fever, typically defined as never exceeding 38.5 degrees Celsius (about 101 degrees Fahrenheit). It is a non-specific finding, but occurs in many diseases, ranging from infectious (viral diseases or infective endocarditis) to autoimmune to malignant causes.
A persistent<unk>  can be a sign of many illnesses.
Low-grade fever
Fever  
Fever
Fever and rash  
Nausea and vomiting
Labored breathing
Abdominal pain
Alertness