Scientists have determined how to prevent half of all Cancer Deaths

In the age of $10,000-a-month cancer drugs that often extend life by the thinnest margins, a few precious months before the cancer rages back, the idea of such a potent effect sounds like a fantasy.
A new study published in the journal JAMA Oncology estimates that by applying insights we've had for decades, no smoking, drinking in moderation, maintaining a healthy body weight and exercising, more than half of cancer deaths could be prevented and new cases of cancer could drop by 40 percent to 60 percent. Even as science gains powerful insights into many types of cancer, there's still a lot that scientists don't yet fully understand about its sinister biology. Meanwhile, the new study drives home an important point: Scientists already know how to prevent a large swath of cancer deaths.
"There sort of are two worlds, one world focused on therapy and another world focused on prevention, and I do think those two worlds are coming together now," said Tyler Jacks, director of the Koch Institute for Integrative Cancer Research at the Massachusetts Institute of Technology.
"There's room for both. Let’s not ignore the power of therapy and its applications for people who have cancer. We simply cannot ignore that," Jacks said. "But why can’t we also include, as we think about cancer control more broadly, the lifestyle issues, the human behavior issues, that can lower overall risk."