The biggest harm of low immunity is not frequent colds and fevers, but this
Modern medicine has confirmed that the level of immunity is determined by five aspects: genetics, age, diet, stress, and sleep. It can be said that our health is also determined by these five aspects.
Many diseases of the human body are related to the immune system. The immune system is like a firewall, defending our body's health at all times against the invasion of pathogenic bacteria. We know that low immunity has many hazards, such as frequent colds, frequent fatigue, easy wound infections, and frequent stomach upsets. These are all manifestations of low immunity. If the above symptoms appear, go to the hospital for blood routine examination and you will find that the white blood cell count is relatively low. This is of great medical reference value, indicating that there is a real problem with immunity.
But there is a particularly big hidden danger of low immunity, and that is cancer. Human somatic cells will die after an average of 50 mitotic divisions, as few as 15 and as many as 120. This is because the telomere will decrease a little every time the DNA is replicated, and there is no way to divide when the final number is reached. go down.
In addition, the number of divisions is different because the division produces lipofuscin that cannot be digested and replaced. When enough of it accumulates throughout the day, cell death is induced. But the difference of cancer cells is that its mutation has the function of adding a piece of telomere when it replicates to the end. This job is done by telomerase. In fact, this function is written on every DNA, but it is always In a locked state, it is only turned on during the meiosis that produces sperm or egg cells, but it is turned on during the mutation process of cancer cells, so that it can proliferate indefinitely.
Under normal circumstances, 100-200 mutated cancer cells are produced in every normal person's body every day. Middle-aged and elderly people over 40 years old will produce 3000-5000 cancer cells every day. But this does not mean that all of us will get cancer, because we have a strong immune system that can identify and eliminate these cancer cells in time.
If there is a problem with the immune system, it will not be able to identify and eliminate these cancer cells in time. At this time, the team of these cancer cells will gradually grow over time. One million cancer cells are only as big as a needle head. At this time, our human body will not feel anything. Until the cancer cells proliferate to the point where there are hard lumps in the human body, the number of cancer cells will be at least 1 billion, and terrible cancers still occur.
Therefore, in order to keep our body healthy, it is imperative to improve our immunity. Immunity can be divided into non-specific immunity and specific immunity according to different objects. Nonspecific immunity mainly refers to the blocking of pathogens by the skin and mucous membranes, and the killing of pathogens by phagocytes, B cells, and T cells. If you want to improve these three aspects, you can rely on a reasonable diet, relax your body and mind, and pay attention to sleep. There is no other way.
Specific immunity is acquired immunity. For example, if a person has had chickenpox, he will never get chickenpox again. So we humans use this principle to invent live-attenuated vaccines, which is to vaccinate people with non-toxic pathogens, so that we can get immunity to this disease. It can be said that vaccines are the simplest and most effective way for us to improve our immunity.