The so-called cancer is simply the result of dysfunction of immune cells B cells and T cells. B cells produce antibodies and play an immune role; T cells directly play an immune role and kill harmful substances such as bacteria and viruses, including cancer cells. T cells, which were originally helpful to control B cells, are affected by infection, radiation or other stimuli, resulting in dysfunction, which leads to the uncontrolled production of excessive and unnecessary antibodies by B cells that produce antibodies, which will lead to some diseases in the body, such as systemic lupus erythematosus, rheumatoid arthritis, chronic active hepatitis and tumors. B cells can also control or enhance the function of T cells. If there is something wrong with B cells, the function of T cells will be disordered, which will also affect the inhibition and killing ability of harmful substances including tumors and cancers.
So at present, the treatment of cancer has entered the third generation treatment stage, that is, the level of immune cells, because the level of immune cells that cause cancer has been studied. The mechanism of immunotherapy is to stimulate or inhibit immune cells with drugs to restore the function of disordered immune cells to normal.