H1N1 Influenza - StatPearls - NCBI Bookshelf - National Center …
https://www.ncbi.nlm.nih.gov/books/NBK513241/
WEBOct 25, 2022 · H1N1 influenza is a subtype of influenza A virus, a communicable viral illness which causes upper and in some cases lower respiratory tract infections in its host. This results in symptoms such as nasal secretions, chills, fever, decreased appetite, and in some cases, lower respiratory tract disease.
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