Viral infection is an infectious disease caused by a virus that can parasitize and reproduce in the human body. The main manifestations are fever, headache, general discomfort, and other systemic poisoning symptoms and virus-host and invasion of tissues and organs caused by inflammation and local symptoms. Infectious diseases pose a threat to public health. A serological examination can use the immunofluorescence method, enzyme-linked immunoassay, and other methods to measure specific antibodies in serum and body fluids to judge the history of the previous infection. Antigen detection is helpful for early diagnosis.
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