A very common, infectious, febrile virus in the world. The flu was first reported in the late 12th century. After that, a few outbreaks in every century have killed millions of people by covering the whole world. Ten major outbreaks since the turn of the twentieth century. In 1918, the great epidemic was called “Spanish infant” because of the outbreak of the disease in Spain. Shortly covering Europe, it passed violently in 1919 in the United States and killed about 20 million people in the world. The last major outbreaks occurred in 1957 and 1968 and were recognized as “Asian infestation.”
In 1933 Andrews and Laidlaw found that the disease was brought to the scene by viruses. Influenza viruses are called influenza viruses and there are three distinct types known as A, B, C. These are also divided into a number of subtypes among themselves. These viruses are resistant to external physical effects. They die shortly with the sun’s rays. It is intolerant to chemical substances such as ether, formaldehyde, phenol.
Flu is a disease that is constantly present throughout the world and often causes epidemics in cold seasons. In the late summer, epidemics have also been detected, beginning in the hot months. All races and breeds are sensitive. It is more common for young children and young people to get caught. Adults have fewer illnesses. The elderly are in danger during outbreaks.
As the outbreaks start from the cities, schools, barracks, factories, etc., the spreading around is fast because the contact is easy in places where they live.
Influenza virus enters the body through the respiratory tract because the respiratory system has a special relationship to the epithelial cells in the winter. The shift is the contact between people. There are a lot of viruses in droplets scattered around the cough and sneeze. They are confused with air and dust. With the inhalation of dust, viruses enter the respiratory tract. The virus is also contagious with the substances used by the patient. Viruses that enter the cells of the respiratory system multiply rapidly. Subsequently, the epithelial cells produced in the viruses explode, causing the viruses to blend into the blood. The toxins of the viruses involved in the blood and general disease symptoms arise. Share Information