In today’s cancer talk, although many medical researchers have been struggling to find cancer-causing factors and treatment means, but so far there is still little gain. Currently, research has found that many organisms such as viruses, bacteria, parasites, etc. maintain a “close relationship” with cancer. It is conceivable that if we can say goodbye to cancer by controlling the infection or invasion of these viruses, bacteria, parasites, etc., the efficiency of cancer prevention can obviously be improved a lot. Now it has been clear and cancer maintains a “close relationship” with biological factors are: 1, mold and cancer Current research has found that there are about 10 kinds of mold may cause cancer, mold produces toxins have a strong carcinogenic or cancer-promoting effects, including aflatoxin to the strongest ability to cause cancer. Aflatoxin is widely found in moldy peanuts, corn, rice and beans, which can induce liver cancer and tumors of kidney, lung, stomach and subcutaneous tissue. Fusarium, which can produce T-2 toxin, can induce stomach cancer, pancreatic cancer and brain tumors in animals, etc., while Penicillium, which commonly produces ashwagandha, can induce thyroid cancer or liver cancer in mice. Experiments have also proved that food such as Lou Di Penicillium, Candida, white mold and other common molds, can promote the formation of nitrosamines in food, and also found that the metabolites of Fusarium and nitrosamines have a synergistic effect. 2, virus and cancer Since the beginning of this century from the chicken malignant tumors found in the Laws sarcoma virus, has proved that there are more than 30 kinds of 150 strains of viruses can be caused by animal tumors, from the experiments of animal carcinogenicity has been a definite conclusion. In 1997, the World Health Organization announced that 84% of cancers have a definite cause of viral infection; while the latest research report of the Cancer Research Organization of the United Kingdom pointed out that about 1.8 million of the new cancer patients in the world every year are caused by viral infection. The most common ones in China are: (1) Liver cancer and hepatitis B virus: the occurrence of liver cancer has a very close relationship with hepatitis B virus (HBV). The disease process of hepatitis B virus leading to hepatitis B, then cirrhosis and finally liver cancer has been confirmed by scientific research. The HBV infection rate of liver cancer patients is generally higher than that of normal and other patients, up to 50% or even higher; meanwhile, the incidence rate of liver cancer in HBV-infected patients is significantly higher than that of other people, and the correlation between the two is as high as 80%. (2) Nasopharyngeal cancer and EB virus: some areas in Guangxi of China are high incidence areas of nasopharyngeal cancer, and many local epidemiological and laboratory research data have proved that Epstein-Barr (EB) virus has a very close relationship with the occurrence of nasopharyngeal cancer. Firstly, there are DNA fragments of EBV in the lesion cells of nasopharyngeal cancer patients, while there are none in normal nasopharyngeal tissues; secondly, the serum investigation of nasopharyngeal cancer patients found that the positive rate is as high as 90.9%, while that of other tumor patients and normal people is 3.5% and 0.6%, respectively; thirdly, the EBV in nasopharyngeal cancer tissues is not only in latent state, but also capable of viral replication. (3) Cervical cancer and human papilloma virus (HPV): In recent years, the survey conducted in East China confirmed that the positive rate of HPV16 DNA in human cervical cancer is 36%-64%; some foreign studies also found that the incidence of invasive carcinoma and intra-epithelial neoplasia in women with herpesvirus II antibody positivity is higher than that in normal women. Therefore, it can be confirmed that human papillomavirus and herpesvirus type II infections play an important role in the occurrence of cervical cancer. 3.Bacteria and Cancer Recently, Prof. You Weicheng, the president of Peking University Cancer Hospital, found that if H. pylori infection can be eliminated from human stomach, the incidence of gastric cancer can be reduced by 40%! And this result was published in the latest issue of the U.S. Journal of National Cancer Research. At the same time, the conclusion was hailed by world peers as another important breakthrough in the related field after the discovery of Helicobacter pylori by Australian scientists Warren and Marshall, who were awarded the 2005 Nobel Prize in Medicine for their discovery. At present, about half of the world’s population is infected with H. pylori, scientific research has found that H. pylori infection and gastritis, gastric ulcers, gastric cancer must be related to the use of certain antibiotics to kill H. pylori can reduce the incidence of gastritis, gastric ulcers, gastric cancer. Soon, a research report from Peking University Cancer Hospital pointed out that patients with long-term H. pylori infection will have 4-6 times higher chances of getting stomach cancer than normal people. And at the same time Helicobacter pylori lead to gastric mucosa related lymphoma, has also been confirmed. 4, parasites and cancer The World Health Organization through epidemiological investigation found that some parasites in the body and a certain kind of cancer, such as schistosomiasis and colorectal cancer is closely related to the cause of schistosomiasis in the patient’s intestinal mucosa under the egg laying, stimulate the local tissue hyperplasia, induced colorectal cancer. Schistosomiasis in the Middle East can cause bladder cancer. According to clinical observation, Schistosoma oryzae is related to the occurrence of primary cholangiocarcinoma, and animal experiments have successfully induced cholangiocarcinoma, and its pathogenic mechanism may be related to the toxic metabolites produced by the worm. Although most medical oncologists believe that the etiology of carcinogenesis is likely to be multifactorial. Even so, the chances of carcinoma development are relatively high in populations infected by microorganisms, and at least this is one of the few effective means of cancer prevention that can be definitively taken at this time. Incidentally, it is important to be alert to even those microorganisms that are not well known to cause cancer. Sometimes it is “better to believe it than not to believe it” and try to take preventive measures.