MEDizzy
MEDizzy
Iqra
Iqra8 months ago
Causes of flu

Causes of flu

The influenza virus causes flu. Influenza A, B and C are the most common types that infect people. Influenza A and B are seasonal (most people get them in the winter) and have more severe symptoms. Influenza C doesn’t cause severe symptoms and it’s not seasonal — the number of cases stays about the same throughout the year. H1N1 (“swine flu”) and bird flu are both subtypes of influenza A.

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