About Bird FluThe cause of bird flu is a type A influenza virus that spreads among birds. The virus then it could spread to other species such as pigs, cats, dogs, tigers, and even humans.
Influenza virus type A has several subtypes that marked the Hemagglutinin (H) and Neuramidase (N). There are 9 variants of H and 14 variants of N. Bird flu virus is contagious when it is the H5N1 subtype has an
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