More than 40% of cancer can be effectively prevented through measures such as maintaining a healthy lifestyle and reducing exposure to carcinogens. "At a press conference held by the National Health Commission on April 23, Xie Yang, spokesperson and director of the Propaganda Department of the National Health Commission, stated that the recommendations in the" Chinese Code of Health Lifestyle for Cancer Prevention "are simple, practical, and easy to implement, and can be directly practiced in daily life to effectively reduce the risk of cancer. Effective cancer prevention "is a hot topic of long-term public concern, and the massive amount of cancer prevention science popularization information on the internet often makes it difficult to distinguish between true and false. What are fabricated cancer prevention rumors? What are the false and misleading information? At the press conference, experts and scholars refuted rumors one by one based on their own fields. Poor quality science popularization often exaggerates, generalizes, and lacks scientific basis. ”Wei Wenqiang, a researcher at the National Cancer Center, said that statements such as "eating a certain food can cure tumors" and "cure all diseases, 100% effective" should not be easily believed. We should be vigilant against promoting specific products under the guise of spreading health knowledge, or directing traffic to unqualified accounts or online paid medical services. Formal popular science knowledge often cites clinical medical guidelines, authoritative reference materials, and other basis. If it is only judged based on individual cases, emphasizing only one aspect, or personal experience judgments, it needs to be carefully screened. ”Wei Wenqiang said. Cervical cancer caused by HPV (human papillomavirus) is the only cancer with a clear cause, and the public often believes that HPV positivity means cervical cancer is not far away. There is no need to panic excessively when HPV positive is detected. ”Wang Jianliu, chief physician of Peking University People's Hospital, explained that many women may have been infected with HPV, but with the strengthening of their immune system, the vast majority of women can clear the virus on their own within 1-2 years and will not cause cervical lesions. Being infected with HPV virus does not necessarily mean having cervical cancer. The process from sustained infection with high-risk HPV to the actual development of cervical cancer is relatively long. If detected and treated in a timely manner during precancerous lesions, the occurrence of cervical cancer can be avoided. Some people believe that even if tumor screening is detected, it may not necessarily cure the disease, and it is better not to investigate. In response, Wei Wenqiang said that abnormal screening results do not necessarily confirm a diagnosis of tumor, and a considerable part of them are only precancerous lesions or early lesions. At this stage, the treatment effect is better, the individual damage is smaller, and the economic burden is lighter. The 5-year survival rate of early discovered patients with breast cancer, colorectal cancer, esophageal cancer, gastric cancer, etc. can reach more than 90%. However, there is a certain amount of radiation in imaging examinations during tumor screening, and some people believe that radiation hazards are significant, but it may not be accurate. Some people's first concern when they hear about CT is radiation. In fact, the natural radiation background dose that each person receives from the natural environment (such as sunlight and soil) every year is about 2.4 millisieverts, while a low-dose spiral CT screening dose is around 1-2 millisieverts. ”Han Baohui, chief physician of Shanghai Chest Hospital, said that for high-risk lung cancer patients, it is recommended to undergo low-dose spiral CT screening once a year in principle. This is more conducive to early detection, diagnosis, and treatment, and the health benefits it brings are significantly greater than the risks brought by low-level radiation. (New Society)