So, what is immunity? How does our immune system fight the virus?
Immunity is the ability of our body's immune system to fight together, and the core of this system is immune cells. Once these immune cells responsible for "swallowing" harmful bacteria and viruses decrease, the immune system loses its "defense" ability and the body is more prone to illness.
In fact, each of us is a small universe, which contains about 60 trillion cells, and each cell is a little star. They keep growing, reproducing and metabolizing, forming our vivid life.
Immune cells, like soldiers, defend our health. Together with immune organs such as spleen and lymph nodes, immune cells form the immune system of human body, which gradually improves with the growth and development of human body. ?
When the immune system finds the invasion of bacteria and viruses or cells with aging variation, it will immediately mobilize the immune cells to annihilate them.
Every day, hundreds of millions of immune cells are produced in human bone marrow, and there are about 2 trillion immune cells in each adult, which have been guarding human health.
Immune cells in human body mainly include innate immune cells such as macrophages, natural killer cells (NK cells) and granulocytes, also known as nonspecific immune cells, and acquired immune cells such as T cells and B cells, also known as specific immune cells. ?
When bacteria, viruses, tumor cells and other foreign bodies are found in the body, the innate immune system plays a role first. They are the normal forces of the body. For example, NK cells can detect molecules related to tumor cell pathogens by releasing perforin and granzyme, and remove aging cells, tumor cells and cells infected by germs.
Macrophages, like engineers, mainly devour and digest dead cells and pathogens, clean up the battlefield and activate lymphocytes or other immune cells.
In addition, dendritic cells can quickly respond to external invaders. They are the radar of the body, constantly patrolling the body, looking for any potential threat. Once the dendritic cells find enemies, such as tumor cells, they will catch them in time and then transmit the antigen information of the invaders to the T cells of the missile forces of the body.
T cells are natural enemies of tumors, and there are many types. Activated cytotoxic T cells, like precision guided missiles, release perforin granzyme, punch holes on the surface of tumor cells, lyse tumor cells and induce tumor cells to apoptosis. ?
In addition to somatic cells, B cells, another specific immune cell in the body, can secrete antibodies to prevent the body from being infected by bacterial viruses.
Studies have shown that cells in the human body also have life cycles. Normal people have about 654.38+000 billion cells growing and updating every day. In the process of metabolism, genes in cells will be abnormal due to environmental factors. Even in healthy people, about 654.38+000 to 654.38+000 million cells may mutate every day. When abnormal mutations accumulate to a certain extent, cells will become cancer cells. ?
Under normal circumstances, the body is protected by the immune system, which can identify and eliminate aging, mutated or infected cells in time. When the immunity is weakened and the fighting capacity of the immune force is reduced, it is prone to infections, tumors and other diseases.
In recent years, with the breakthrough in the field of life science, we can train some of our own immune cells to improve their combat effectiveness.
For example, we can collect healthy and immunocompetent seed cells from blood and complete the special training process of cultivating, expanding or transforming these seed cells in a cell laboratory with strict quality control, thus forming the special power of immune cells. Then these excellent special forces will be added to the human body through intravenous intervention and other means. ?
On the one hand, these special forces are extremely lethal and can directly participate in the battle. At the same time, they can also "heal the wounded and rescue the dying" to the immunocyte soldiers with low function in human body, and enhance the combat effectiveness of these troops, so as to gradually restore and enhance the overall immunity, effectively remove the mutated cells, virus-infected cells or tumor cells in the body, and restore human health.
Using cell technology to keep young
Medical research shows that human immunity reaches its peak in young people. With the growth of age, the renewal ability of newborn immune cells is weakened, and the aging immune cells have to work longer hours and have heavier loads, which leads to a sharp increase in the number of "old, weak and sick" in the immune force, and the ability to fight viruses and bacteria and remove mutated cells is also weakened year by year, and the risk of illness is relatively increased.
Because the human body is composed of cells, diseases, aging and sub-health of the human body are closely related to the function of our immune cells.
Complement cells properly to make reserves for health.
In the whole journey of life, with the growth of age, our immunity and immune cells will continue to decline-environmental pollution, radiation, ultraviolet rays, virus and bacteria infection and bad lifestyle will also affect the activity of immune cells.
When we get old, our bodies will no longer be able to "resist infection" as before, and the weakening of immunity will also make our health worse. Therefore, the best health care is to properly replenish immune cells and make reserves for health.