More Americans die from heart disease, but cancer is rapidly gaining ground as the No. 1 killer.

In 22 states, more people died from cancer during 2014 than from heart disease, new data from the National Vital Statistics System indicated…

Cancer deaths gaining on deaths related to heart disease might be explained by the fact that “treatment for cancer is more complex, and we are not able to treat cancer as effectively as cardiovascular disease yet,” Boffetta said.