Viral pharyngitis. Close up of inflamed, pus- covered tonsils in a patient with a throat infection (or pharyngitis) caused by a non- specific virus. Viral infections such as glandular fever or influenza are caused by the Epstein-Barr virus, influenza virus, or cytomegalovirus. Once in the body the virus multiplies inside lymphocyte white blood cells. Symptoms of glandular fever include high fever, sore throat and swollen lymph nodes, particularly in the neck. Most patients recover from glandular fever within 4-6 weeks but frequently feel tired and run-down for a further two or three months.

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