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Influenza Research Paper

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The flu (influenza) is a highly contagious virus that attacks the respiratory system. The flu has three strains, H1N1 strain, H3N2 strain and influenza B strain. The first known case according to UXL Encyclopedia of Diseases and Disorders “The first influenza pandemic that is known to have been global in scale took place in 1850; it started in China and spread across central Asia to Africa and then to Europe where it nearly wiped out the populations of several major cities in southern Italy and Spain”. The number of cases in the U.S. and worldwide is according to www.cdc.gov “There has been 11,965 laboratory-confirmed flu-related hospitalizations.” The number of cases in the US and world wide per year is 3-5 million. The type of infection

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