We all know the viruses that infect and threaten human health and the impact on performance and activity, and can he have to pay and we also know that it causes a disease and the most common:
influenza:
Influenza (flu,) virus is highly contagious respiratory disease,and spreads from one person to another by sneezing and coughing. Compared to most influenza viral respiratory tract infections other Influenza (cold), we find that the symptoms of fluare very severe.
Seasonal influenza infection, the spread of infection is usually in the winter and the last several weeks. And infects an estimated 100 million people in America, Europe, and Japan (approximately 10% of the population). In addition to preventing millions of people from practicing their work or go to school,Influenza caused the death of 20,000 people, and many more that are in their admission to hospitals, estimated that 20-25 million people visit their doctors every year in the United States of America.
How the virus spread?
The virus passes from person to person by sneezing and coughing. The virus is inhaled through the nose or mouth and reach the cells of the respiratory tract, which begins to reproduce.The virus can also enter the human body through the mucous membranes of the nose, mouth or eyes, too.
Infected person can infect others before symptoms appear about 24-48 hours and the ability to continue spreading the virus to the third or fourth day after onset of symptoms. Regardless of the nature of some of the symptoms of the flu, which affects all parts of the body, is not to detect the presence of the virus outside the respiratory tract.
التسميات
flu