1.Cancer threat WHO expects the global cancer incidence to increase by 50% by 2020, which means 15 million new cancer patients will be added every year. 20% of the world’s new cancer patients are in China. 2. Public misconceptions about cancer The International Union Against Cancer (UICC) has outlined the following four points: (1) Cancer is only a health topic. (2) Cancer is a disease of affluence and mainly occurs in developed countries. (3) Having cancer is a death sentence. (4) Cancer is destined to happen. 3. Changes in public perception of cancer in the U.S. 19th century Cancer equals death concealed cancer diagnosis from patients. 1900-1920s Opposition to fatalism. Public education: cancer can be cured by early surgical treatment. 1960s-1970s. Patients can be informed of cancer diagnosis. U.S. federal government mandatory informed consent guidelines. 4. The current situation of public awareness of cancer in China In 2012, Sohu Health conducted an online survey on “Caring for Life, Scientific Cancer Prevention”: 57% of netizens thought cancer was very scary. 30% of the netizens thought cancer was generally scared. 13% of the netizens thought cancer was not scary. 5. Correct understanding of cancer WHO put forward the famous three 1/3: (1) 1/3 of cancers can be prevented. (2) 1/3 of cancers can be cured if they are diagnosed early. (3) 1/3 of cancers can be treated to improve the quality of life and prolong the survival time.