Chronic viral hepatitis is the culprit of liver cancer Chronic viral hepatitis, such as hepatitis B and C, is an important cause of liver cancer. China now has 12 million cases of chronic hepatitis patients, and about 300,000 die from liver disease every year, 50% of which are primary hepatocellular carcinoma, the majority of which are related to hepatitis B and C virus infection. “The main causative factors of liver cancer in China are hepatitis B and C viruses, and what the people think of as liver cancer infection is actually hepatitis infection, and chronic viral hepatitis is again a high-risk causative factor leading to liver cancer.” Hao Chunyi mentioned that hepatitis is mainly transmitted through blood, and the WHO has also included it as a sexually transmitted disease. H. pylori can cause gastritis and peptic ulcers, which can lead to gastric cancer. 10 years ago, the WHO designated H. pylori as a carcinogen. H. pylori is highly contagious and can be transmitted through hands, unclean food, unclean utensils and feces, so it is important to practice good hygiene in your daily diet. It is recommended to use communal chopsticks and spoons as much as possible when gathering for meals, and it is better to implement a meal-sharing system. Pickled foods containing nitrosamines also have carcinogenic effects, which, together with the positive effect of H. pylori, can increase the chances of cancer. The bane of cervical cancer and its precancerous changes has been proven to be the infection of human papilloma virus, which is transmitted mainly through sexual contact. Wei Lihui, director of the Department of Obstetrics and Gynecology at Peking University People’s Hospital, has urged women to have regular cervical screening after the age of 30. Experience from developed countries has proven that cervical screening can significantly reduce cervical cancer mortality by 50%. The high incidence of nasopharyngeal cancer, which is also caused by infection with a bacterium called EBV, was also mentioned, with close contact via the mouth as the main route of transmission. “Some tumors are caused by infectious diseases, but direct transmission of tumors is generally not present.” Cancer can also occur in families Currently, it is not uncommon for couples, fathers and sons, brothers and sisters to suffer from cancer together, and in the case of liver cancer, for example, family gathering is very common. The reason for this phenomenon is related to the same lifestyle and diet structure among family members. The development of tumor depends on the combination of many acquired factors such as mental factors, environmental factors, dietary factors, lifestyle factors and external carcinogens. “Couples, fathers and sons and other family members living together for a long time, if the diet structure is not reasonable and the living habits are not good, it will lead to the increased chance of common incidence. For example, the development of esophageal cancer is related to frequent consumption of overheated food.” Hao Chunyi said that with the improvement of people’s life, eating more fatty things, coupled with the lack of exercise, the incidence of intestinal cancer has increased significantly. Family members should work together to establish healthy habits, try not to eat or less smoked, barbecued and fried foods, eat more fresh vegetables and fruits, and also pay attention to prohibiting smoking and limiting alcohol to raise awareness of cancer prevention.