Avian Flu
1 Avian Flu: Some types of Avian Flu viruses (H5N1, H7N7) are associated with severe and fatal disease. 2  The viruses do not usually infect humans, however, confirmed cases of human infection have been reported since 1997, especially in Asia. Type C has been found in humans, pigs, and dogs and causes either a very mild illness, or has no symptoms at all. It does not cause epidemics and does not have the severe public health impact that influenza types A and B do. The typical incubation period for influenza is 1 to 4 days, with an average of 2 days. As determined by the CDC, the viruses in a flu shot and FluMist vaccine can change each year based on international surveillance and scientists' estimations about which types and strains of the flu will be most potent that year. Birds are not cap able of carrying either type B or C influenza viruses. There are three main subtypes of avian flu, including H5, H7, and H9. The subtypes H5 and H7 are the most deadly, while the H9 subtype is less dangerous. Recommend on Facebook Tweet ShareCompartir. There are three types of influenza viruses: A, B and C. Wild aquatic birds-particularly certain wild ducks, geese, swans, gulls, shorebirds and terns-are the natural hosts for all known influenza type A viruses. Influenza A viruses are divided into subtypes on the basis of two proteins on the surface of the virus: hemagglutinin (HA) and neuraminidase (NA) . For example, an “H7N2 virus” designates an influenza A virus subtype that has an HA 7 protein and an NA 2 protein. Influenza, more commonly known as “the flu,” is caused by a contagious virus. Symptoms include body aches, sore throat, headache, fever, coughing, and chills. Perhaps because influenza is so common, misconceptions about the disease abound. Influenza is still very common in the U.S.: According to the Centers for Disease Control and Prevention, between 5 percent and 20 percent of Americans get the flu every year, and about 36,000 cases are fatal. The disease can be treated by antiviral medicines, and a seasonal vaccine is available to protect against it. Influenza C viruses are also found in people. They are, however, milder than either type A or B. People generally do not become very ill from the influenza type C viruses. Type C flu viruses do not cause epidemics. Birds are not cap able of carrying either type B or C influenza viruses. There are three main subtypes of avian flu, including H5, H7, and H9. The subtypes H5 and H7 are the most deadly, while the H9 subtype is less dangerous. Influenza, commonly known as the flu , is an infectious disease caused by the 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. Children and teenagers with flu symptoms (particularly fever) should avoid taking aspirin during an influenza infection (especially influenza type B), because doing so can lead to Reye's syndrome, a rare but potentially fatal disease of the liver. Stomach symptoms, such as nausea, vomiting, and diarrhea, are not typical symptoms of influenza, but can occur. These symptoms are more common in children than adults. Read More: Influenza is also called the flu and is caused by the Influenza virus. This virus targets the respiratory tract and results in an infection that settles into the nose, sinuses, throat, bronchial tubes and possibly the lungs. Type C has been found in humans, pigs, and dogs and causes either a very mild illness, or has no symptoms at all. It does not cause epidemics and does not have the severe public health impact that influenza types A and B do. The typical incubation period for influenza is 1 to 4 days, with an average of 2 days. Flu, or influenza, is a contagious respiratory in fection caused by a variety of flu viruses. Symptoms of flu involve muscle aches and soreness, headache, and fever. Type A flu or influenza A viruses are capable of infecting animals, although it is more common for people to suffer the ailments associated with this type of flu. Wild birds commonly act as the hosts for this flu virus. Type A flu virus is constantly changing and is generally responsible for the large flu epidemics. There are three types of flu viruses: A, B, and C. Type A and B cause the annual influenza epidemics that have up to 20% of the population sniffling, aching, coughing, and running high fevers. Type C also causes flu; however, type C flu symptoms are much less severe. Type A flu or influenza A viruses are capable of infecting animals, although it is more common for people to suffer the ailments associated with this type of flu. Wild birds commonly act as the hosts for this flu virus. Type A flu virus is constantly changing and is generally responsible for the large flu epidemics. The avian influenza virus causes bird flu. Birds can be infected by influenza A viruses and all of its subtypes. Birds are not cap able of carrying either type B or C influenza viruses. There are three main subtypes of avian flu, including H5, H7, and H9. The subtypes H5 and H7 are the most deadly, while the H9 subtype is less dangerous.
http://bami.us/Influenza/InfluenzaAbout.html http://www.webmd.com/cold-and-flu/flu-guide/advanced-reading-types-of-flu-viruses?page=2 http://www.cdc.gov/flu/avianflu/influenza-a-virus-subtypes.htm http://www.learnnc.org/lp/pages/4067 http://www.webmd.com/cold-and-flu/flu-guide/advanced-reading-types-of-flu-viruses?page=2 https://en.wikipedia.org/wiki/Influenza http://bami.us/Influenza/InfluenzaAbout.html http://www.webmd.com/cold-and-flu/flu-guide/advanced-reading-types-of-flu-viruses http://www.webmd.com/cold-and-flu/flu-guide/advanced-reading-types-of-flu-viruses http://www.webmd.com/cold-and-flu/flu-guide/advanced-reading-types-of-flu-viruses?page=2
what kinds of flu are fatal