Fever is a generalized condition where the body temperature is higher than the normal 37.8°C (100°F) as measured by an oral thermometer or 38°C (100.4°F) as measured rectally. Fever may be a symptom of another condition, especially in cases where it occurs with another symptom ie, sinusitis (with headache and nasal congestion), measles (with a rash), etc. It may also be caused by a viral infection eg, the common cold and influenza. Aside from bacterial and viral infections, other causes of fever include cancer, autoimmune diseases, or hypothalamic damage. Fever plays a positive role as part of the body’s defense against some infections.
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