Seasonal influenza flu Seasonal influenza viruses circulating and causing disease in humans every year. In winter weather, often tends to cause more disease in season in winter, spread from the surface of a person. Seasonal flu usually contamination through coughing, sneezing or touching the virus. Can cause serious illness, contact, and loss of life, especially in some individuals with high risk. People with increased risk for severe disease, including pregnant women, children, and many people are immune compromised and people with chronic medical conditions. Basic virus influenza season contain the continuous evolution. This means that people will be infected multiple times throughout their lives. Therefore, an element of the accines seasonal flu are frequently studied (current biannually) and updated periodically to ensure that the effectiveness of the vaccine still has three large groups or types of seasonal influenza viruses: A, B and C influenza virus type bae.Bend out the subtype specific diversity and by the combination of the two proteins that occur on the surface of the virus protein neuraminidase and hemagglutinin, or H "or" N "protein. The current influenza A (H1N1) and a (H3N2) have been circulating. Seasonal influenza virus infection. The seasonal virus A (H1N1) virus is the same as the cause of the outbreak of swine influenza 2009 while it is within range of the flow of the season. There are also two other types of viruses that have been circulating influenza virus according to the season, which has been named an area where they were first identified as Victoria and Yamagata neage. Descent type influenza that cause infections and outbreaks are related to an incident in small. As the influenza C poses much less of a burden of disease than influenza A and B only, will be included in the seasonal flu vaccine. -------Pandemic influenza----- Occurs when a flu virus that has not previously found in humans and most people do not have immunity about it and send in a man. These viruses may pop out of circulation and cause major outbreaks outside the normal flu season, as most of the population has immunity against these viruses do not have a proportion of the population that may be infections is huge. Some epidemic might result in large numbers of infections of severe infection, but the reasons behind these differences are not completely understood. The most well known epidemic, where existing information is "1918-1919 flu in Spain, which produces approximately 20-50000000 people died worldwide. Epidemics that occur later in the year 1957 and 1968 resulted in fewer deaths, many in spite of the majority of the world population. The risk of infection.
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