Not all cancers are written in your genes. A sweeping new report from the World Health Organization found that up to four in 10 cancer cases around the globe could be prevented with lifestyle changes. In the large international study, researchers identified 30 modifiable risk factors that fuel the disease — including, for the first time, nine cancer-causing infections. “This is the first global analysis to show how much cancer risk comes from causes we can prevent,” Dr. André Ilbawi, the WHO’s