The human body is like a kingdom, with 40-60 trillion cells working and living in their own right

The human body is like a kingdom, there are 40-60 trillion cells in the kingdom of work and life, most of which will not see each other for a lifetime, one is a huge number, the chance of meeting each other is very small, the other, most of the cells are fixed in a certain organ, it is impossible to swim around, so the cells in the human body, generally only deal with a few neighbors around in a lifetime, of course, they may also encounter human sentinels passing by - immune cells

There are many kinds of immune cells, there are macrophages, lymphocytes, neutrophils, etc.

Have you thought about it, if these immune cells rebel what to do, they kill the bacterial virus that is a good hand to swallow them one by one without mercy, but if they aim the muzzle of the gun at their own people will have what consequences, the consequences are actually very serious, will lead to a series of autoimmune diseases, such as the destruction of joints lead to arthritis, the destruction of the skin leads to rashes, the destruction of glands lead to dry mouth, dry eyes, these diseases together are called connective tissue disease, including rheumatoid arthritis, systemic sclerosis, lupus erythematosus and so on They can also destroy lung tissue leading to a common symptom – interstitial lung disease or even pulmonary fibrosis

The treatment of this interstitial lung disease is mainly anti-rheumatic therapy, and the drugs are used to vigorously suppress the "rebellious" immune cells, using hormones and immunosuppressive drugs, these rebellious cells, no matter how much they usually contribute, as long as they attack their own cells, they must be ruthlessly cleared or suppressed, otherwise they may endanger the organs of the whole body and cause damage