Influenza A virus

Influenza A virus is a common influenza virus. It is prone to mutation and its main subtype is called avian influenza. Therefore, it is also an acute infectious disease in daily life. The symptoms after infection are mainly high fever and cough, accompanied by pneumonia and some minor functional disorders. Therefore, it is necessary to carry out timely treatment and prevention in daily life.

The virus mainly relies on viral proteins in the human body to invade the human body. It is necessary to carry out prevention and treatment in time. In daily life, we must pay attention to maintaining personal hygiene and develop good hygiene habits. We must ventilate frequently to reduce indoor air and keep fresh air.

Influenza viruses are divided into three types: A, B, and C. Type A influenza virus is most likely to mutate. An influenza pandemic is caused by the emergence of new subtypes of influenza A virus or the reappearance of old subtypes. The surface antigens of influenza A viruses often undergo small mutations, which are called "drift". Figuratively speaking, "drift" means that the virus disguises itself through small changes to avoid recognition by the human immune system. The result of the "drift and mutation" of the type A virus is that the strain that causes influenza may be different every year, and people need to be re-vaccinated with influenza vaccine every year for prevention. A "shift" is when the influenza A virus mutates, resulting in the emergence of a new "subtype" of the virus. Because the human body has almost no antibodies to resist this new virus, the result of "mutation" often leads to a global outbreak of influenza.

Principle of Action Influenza viruses usually rely on the combination of a certain part of the viral protein with a specific protein in the human body to invade the human body. Because through such a combination, the influenza virus can suppress the human body's own natural defense system against viral infection, paving the way for the virus to effectively replicate in the human body.

Influenza viruses are divided into three types: A, B and C. Influenza A virus is divided into many subtypes based on the differences in H and N antigens. H can be divided into 15 subtypes (H1~H15) and N has 9 subtypes (N1~N9). Among them, only H1N1, H2N2, and H3N2 mainly infect humans, while the natural hosts of many other subtypes are various birds and animals. Among them, the H5, H7 and H9 subtypes are the most harmful to poultry. Generally, avian influenza viruses do not infect animals other than birds and pigs. However, in 1997, Hong Kong reported its first 18 cases of H5N1 human avian influenza infection, including 6 deaths, which attracted widespread attention from the world. Since 1997, there have been several incidents of avian influenza virus infecting humans in the world. Once highly pathogenic avian influenza viruses such as H5N1, H7N7, H9N2, etc. mutate and become capable of transmission from person to person, they will cause an epidemic of avian influenza in humans, indicating that avian influenza viruses have become a great potential threat to humans.

The above are the symptoms of influenza A. They must be treated and prevented in a timely manner. In daily life, you must pay attention to maintaining personal hygiene and develop good hygiene habits. Frequently ventilate and reduce indoor air to maintain fresh air. You must pay attention to your life and exercise regularly by doing outdoor sports to enhance your physical fitness. During recovery, choose some other types of anti-infection foods in your daily life.