Feverish child. Four-year-old girl in bed with a fever. Fever, known as pyrexia, is defined as a body temperature above 37 Celsius ( Fahrenheit),

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Feverish child. Four-year-old girl in bed with a fever. Fever, known as pyrexia, is defined as a body temperature above 37 Celsius ( Fahrenheit), when the temperature is taken orally. Most fevers are caused by bacterial or viral infections and may be accompanied by other symptoms such as shivering, sweating, headaches, thirst and hot skin.

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Photo credit: © IAN BODDY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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Keywords: -year-, 4, bacterial, bed, black, care, child, fever, feverish, flu, forehead, girl, hiding, high, ill, illness, infant, infection, influenza, pyrexia, resting, sick, sickness, temperature, unwell, viral, years, young