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Influenza a

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The known subtypes of influenza A virus that create influenza and are endemic in pigs are H1N1, H1N2, H3N1 and H3N2. Horse flu (or "equine influenza") refers to varieties of influenza A virus that affect horses. Influenza A virus subtype H1N1 - Avian influenza - Influenza A virus subtype. Influenza, commonly known as "the flu", is an infectious disease caused by an influenza virus. Symptoms can be mild to severe. The most common symptoms include: a high fever, runny nose, sore throat, muscle pains, headache, coughing, and feeling tired. 24 Aug Previously, all flu vaccines protected against three influenza viruses: one Influenza A (H3N2) virus, one Influenza A (H1N1) virus, and one Influenza B virus. About two weeks after getting a flu shot or FluMist, antibodies that provide protection against the flu viruses develop in your body. Flu Symptoms - What Causes the Flu? - How a Doctor Avoids the Flu.

19 Apr Information about Influenza Type A Viruses and Subtypes - CDC. 27 Sep There are four types of influenza viruses: A, B, C and D. Human influenza A and B viruses cause seasonal epidemics of disease almost every. 18 Apr Although avian influenza A viruses usually do not infect people, rare cases of human infection with these viruses have been reported. Infected.

This is how you become infected with influenza. [Droplet infection]. A healthy person may become infected by breathing in virus expelled with saliva, etc., when. Novel influenza A (H1N1) is caused by a new flu virus that was first detected in April, The virus is infecting people and is spreading from person-to-person. The subtypes of influenza A viruses are determined by envelope glycoproteins possessing either haemagglutinin (HA) or neuraminidase (NA) activity. 6 Dec The flu is a highly contagious and common illness that is caused by the influenza virus. There are three different types of flu viruses: influenza A. Influenza A is a highly contagious respiratory illness. It's not usually dangerous if you are healthy, but can cause serious problems if you're not. Find out more.

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