- Be smoke-free. This one’s a biggie in the cancer world. Lung cancer is the number one cause of cancer deaths. Most experts agree that tobacco use causes 90 percent of lung cancers in men and 80 percent of lung cancers in women.
- Hepatitis B and C. Both cause liver inflammation that can turn into liver cancer. And both are transmitted by the exchange of blood or bodily fluids. There is one difference -- hepatitis B has a vaccination recommended for sexually active, non-monogamous adults, people with sexually transmitted diseases, those with chronic liver disease, HIV infection, men who have sex with men, intravenous drug users and health care professionals who may come in contact with bodily fluids.