Influenza infection How
the flu virus enters the body through the respiratory tract. The infection is located in aerosol in the air from coughing, sneezing patients. When the inhalation of bacteria Infection is the increase in the number of cells lining the respiratory tract. And causes illness in 18 to 72 hours of flu currently is how the importance of influenza is that the virus has spread widely, often times, a worldwide epidemic (pandemic) outbreaks often. Born in Winter In general, every winter there is a higher number of patients than any other season. Each year it is estimated that influenza infection of around 10-15% of the total population. The virus has spread widely due to the sensitive nature of the virus has changed the nature of the protein that is the target of attack of the immune system easily. The appearance of such proteins to make antibodies in the body of people who have HIV can protect against infection with a new strain of the virus is able to infect repeated. So when the virus changes over time, it is usually followed by an epidemic because no immunity to the new virus strain whatsoever. As a result, many virus strains. The system, called a strain of virus that is to say the type A or B where it was first isolated. Years of isolation for the first time. And a type of protein on the surface of the virus that is the target of the immune system is. hemagglutinin and neuraminidase, such as virus A / Bangkok / 01/79 (H3N2) isolated in Bangkok in the year. 1979 is the virus is first isolated in that year and a hemagglutinin type 3 and neuraminidase type 2 virus is. epidemic in Europe and America, mostly influenza A (H3N2), but were reported A (H1N1) contamination in some countries, including influenza B are similar. B / Yamanashi / 166/98. However, the level of the epidemic at present, despite a rising number of patients, but was not held in an outbreak. Only in the event that there are more patients than expected in the season (higher than expected seasonal activity) is also a mild level is between 200-400 patients per 100,000 population.
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