Is allergy because of low immunity?Many people may have this misunderstanding

Every fall, the concentration of pollen in many places across the country enters the seasonal peak period, and the high incidence of allergic diseases caused by it is raging. Sneezing, snoting, tears ... Where are these "difficult" symptoms?

The Voice of China and the China Science and Technology Center for the Chinese Association for Science and Technology to launch a full media science popularization column -the master class "Scientist Lecture Science". Twenty academicians talked about hot events and answered questions for the public. In this issue, Dong Chen, an academician of the Chinese Academy of Sciences and a professor at the School of Medicine of Shanghai Jiaotong University, and Wang Yuandan, a professor at the Ministry of Medicine of Peking University, reveals the operating password of the human immune system.

Immune system with "memory"

Academician Dong Chen introduced that immune cells can usually be divided into two categories. One is cells with devouring and attack capabilities for germs, and the other is lymphocytes, including B cells and T cells.

△ Immune cells in the human body

Once the virus invades the human body, these immune cells will carry out their duties to "defend". Academician Dong Chen said that the recognition and elimination of the virus of the human immune system can be divided into two stages. The first stage is the response stage of natural immunity, and the second stage is the response stage of obtaining sexual immunity.

Academician Dong Chen introduced that the characteristics of natural immunity are extensive and can fight for a variety of microorganisms. There is no specialty or targetedness, so it is also called non -specific immunity. But the natural immune response came quickly and went fast. There was an immune response for one or two days, and it had fallen to the low point on the fifth and sixth days. By the second stage, the main functions were B cells and T cells. Establishing sexual immunity.

△ The difference between natural immunity and acquisition immunity during the response stage

Academician Dong Chen said, "Immune memory is the basis for developing various types of vaccines now. If we use vaccines to activate our specific B cells T cells, and they can be pre -stored in our body for a long time, so that we can form us more than us. For long -term protection, humans have obtained the ability and immune memory without being infected with these viruses. "

The stronger the immunity, the better?

Academician Dong Chen pointed out that age has an impact on the body's immunity at that time, but the stronger the immunity is, the better. The best state of immunity is balance. When there are viruses or germs invading, it can respond in a timely manner, but do not have an excessive response to the environment.

Professor Wang Yuedan also proposed that there is a balanced relationship between the human body and the environment. The best state is that the immunity of the human body is compatible with the environment.

The allergic disease that has troubled many people for a long time is actually the human body's immune response to the environment is too strong or inappropriate. The improvement of social living standards and the improvement of hygiene conditions have made the environment we come into contact with more "clean", and the opportunities of the human body to come into contact with various natural materials have also decreased, which is more likely to cause allergies.

Academician Dong Chen said that with the continuous development of immunology, the targetedness of related drugs is more accurate and side effects are getting smaller and smaller. These drugs can effectively block cytokines produced by immune cells, cut off the communication between immune cells, and alleviate the inflammatory response of the disease.

△ Drug research for immune diseases continues to develop

Is it "IQ Tax" for health care products to improve immunity?

Professor Wang Yuedan said that supplementary nutrients may have a certain regulatory effect. You must first evaluate according to your own situation, and then decide whether to spend money to buy and take health products.

Regular schedules, balanced diet, and appropriate exercise help to maintain a balanced state. In addition, immunity is also closely related to psychological factors. Emotional anxiety or in a state of tension for a long time, it is easy to have a certain impact on the plant nerves, and the plant nerves and immune systems have a close connection, which can easily cause the immunity to decrease sharply within a period of time.

Master's classroom "Scientist Lecture Science" series of programs, so stay tuned!

Source: Voice of China (ID: ZGZS001)

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