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It was also believed that concurrent circulation of two different influenza A subtypes did not occur. Although laymen refer to many incapacitating respiratory infection as «flu», true influenza is attributable to the small household of the Orthomyxoviridae. Myxo derives from the Greek for mucus and refers to the ability of these viruses to attach to mucoproteins on the cell floor; ortho means true or regular, as in orthodox, and distinguishes these viruses from the Paramyxoviridae (measles is a member of this family). It was first recognized by its potential to agglutinate erythrocytes, hence its title, but it’s now obvious that it also has important roles within the attachment and entry of virus to the cells of the host and in determining virulence. Its predominant perform appears to be linked with release of recent virus from cells. The main nutritional elements of bird’s nest are: water-soluble protein, carbohydrates, trace parts — calcium, phosphorus, iron, sodium, potassium and an essential element crucial for the human physique «neuraminic acid», also called «bird’s nest acid». They are: Influenza virus A, B and C as well as Thogoto-like virus which is a tick-borne virus of mammals.
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