There are two popular glycoproteins present on the surface of Influenza virus namely, Haemaglutinin (HA) and Neuraminidase (NA)
A viral infection known as influenza targets the respiratory system, including the nose, throat, and lungs. Although influenza is frequently referred to as the flu, it differs from stomach "flu" viruses that cause vomiting and diarrhoea. Most people's flu symptoms go away on their own.
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