Cancer is a very complicated and diverse disease. At present, except teeth and hair, other tissues and organs of the human body will produce cancer. There are about 350 kinds of human cancers, and each cancer can be divided into different subtypes. Many normal tissues may gradually become uncontrollable tumor cells under the changes of external environmental pressure and growth microenvironment. Because cancer cells grow rapidly, they will rob the nutrients needed for the normal growth of cells and hinder the normal growth of the body, thus bringing a huge health crisis to the body.
At present, the treatment of tumor is mainly radiotherapy and chemotherapy, targeted therapy and immunotherapy. Bacteria activate the immune system, thus increasing the killing of tumor cells. This is the most promising tumor treatment method at present.