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Fever of less than 3 days duration is commonly encountered in general practice and is most likely to be case of viral infection of the respiratory tract. It is important however to be on a lookout for other infections such as urinary tract infection and pneumonia. A complete general physical examination as well as routine blood tests and urine examination will help come to a diagnosis. The majority of the patients can be managed conservatively. If the fever persists for more than 4 days a less common infection must be suspected since most viral infections subside in 4 days.
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