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Slayt 1
Slayt 1

... Large virion consists of a negative RNA genome in a helical nucleocapsid surrounded by an envelope containing a viral attachment protein (hemagglutininneuraminidase [HN], parainfluenza virus and mumps virus; hemagglutinin [H], measles virus; and glycoprotein [G], respiratory syncytial virus [RSV]) a ...
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Document

... and pneumonia in children and a disease resembling the common cold in adults. They are responsible for 50-80% of respiratory tract infections Measles virus causes measles Mumps virus causes mumps The source of infection is an ill person ...
Ready or Not: Preparing for Pandemic Flu
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...  Most people have immunity ■ Severe cases are more frequent in immuno-compromised and elderly populations  A flu vaccine cocktail is custom-assembled each year for the expected “flu” strains  Each year approximately 36,000 die from the common flu in the U.S. INFECTED INDIVIDUALS MAY AFFECT OTHERS ...
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... http://usatoday30.usatoday.com/news/health/2009-04-27-swine-flu-vaccine_N.htm ...
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The bird flu
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... that appear healthy. Avoid contact with dead birds. Avoid contact with items or surfaces that may have been contaminated with excrement from an infected bird. All foods from poultry, including eggs, should be thoroughly cooked. As with other infectious illnesses, one of the most important preventive ...
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... 3. (A) They are effective only against influenza A viruses. This statement is incorrect. Unlike the first generation anti-influenza drugs (amantadine and rimantadine), the newer drugs have been shown to be effective against both A and B strains of the influenza virus. The reduced level of central ne ...
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... virus changes and different varieties occur each year. That means that vaccines need to be changed on a yearly basis. This ensures they are effective against the virus type most likely to affect the community in the coming season. All high risk persons should be vaccinated with a new vaccine each ye ...
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... Period of infectivity The patient is infectious from one day before to 3-5 days after onset of symptoms. Clinical features Influenza is characterised by sudden onset of symptoms with fever, headache, muscle weakness, sore throat and dry cough and lasts 2-7 days. The most frequent complication of inf ...
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Influenza



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. These symptoms typically begin two days after exposure to the virus and most last less than a week. The cough, however, may last for more than two weeks. In children there may be nausea and vomiting but these are not common in adults. Nausea and vomiting occur more commonly in the unrelated infection gastroenteritis, which is sometimes inaccurately referred to as ""stomach flu"" or ""24-hour flu"". Complications of influenza may include viral pneumonia, secondary bacterial pneumonia, sinus infections, and worsening of previous health problems such as asthma or heart failure.Three types of influenza affect people. Usually, the virus is spread through the air from coughs or sneezes. This is believed to occur mostly over relatively short distances. It can also be spread by touching surfaces contaminated by the virus and then touching the mouth or eyes. A person may be infectious to others both before and during the time they are sick. The infection may be confirmed by testing the throat, sputum, or nose for the virus. A number of rapid tests are available; however, people may still have the infection if the results are negative. A type of polymerase chain reaction that detects the virus's RNA is more accurate.Frequent hand washing reduces the risk of infection because the virus is inactivated by soap. Wearing a surgical mask is also useful. Yearly vaccinations against influenza are recommended by the World Health Organization for those at high risk. The vaccine is usually effective against three or four types of influenza. It is usually well tolerated. A vaccine made for one year may not be useful in the following year, since the virus evolves rapidly. Antiviral drugs such as the neuraminidase inhibitors oseltamivir among others have been used to treat influenza. Their benefits in those who are otherwise healthy do not appear to be greater than their risks. No benefit has been found in those with other health problems.Influenza spreads around the world in a yearly outbreak, resulting in about three to five million cases of severe illness and about 250,000 to 500,000 deaths. In the Northern and Southern parts of the world outbreaks occur mainly in winter while in areas around the equator outbreaks may occur at any time of the year. Death occurs mostly in the young, the old and those with other health problems. Larger outbreaks known as pandemics are less frequent. In the 20th century three influenza pandemics occurred: Spanish influenza in 1918, Asian influenza in 1958, and Hong Kong influenza in 1968, each resulting in more than a million deaths. The World Health Organization declared an outbreak of a new type of influenza A/H1N1 to be a pandemic in June 2009. Influenza may also affect other animals, including pigs, horses and birds.
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