Influenza in humans is caused by two types of influenza virus – A and B. Influenza A viruses are divided into subtypes based on the structure of two proteins on the surface of the virus – hemagglutinin (H) and neuraminidase (N).
2022-09-07
Influenza in humans is caused by two types of influenza virus – A and B. Influenza A viruses are divided into subtypes based on the structure of two proteins on the surface of the virus – hemagglutinin (H) and neuraminidase (N).
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