The structure of the Influenza virus is usually spherical or ovoid in shape. The Influenza virion covered in an envelope made of lipid bilayer from the plasma membrane of a host cell. There are spikes of glycoproteins called haemagglutinin and neuraminidase embedded in the envelope. Approximately 80% of the spikes are haemagglutinin and the remaining 20% are neuraminidase. These proteins enable the virus to effectively bind with a host cell. On the inner side of the envelope is the capsid, which is an antigenic matrix protein lining. Within the envelope is the Influenza genome, which is organized into seven or eight strands of RNA. The RNA is encased with nucleoprotein into a helical ribonucleoprotein form, with three polymerase peptides
