E-cigarettes are marketed as a safer way to inhale nicotine, but the evidence remains unclear on benefits and harms. Nam Y. Huh/AP hide caption
smoking cessation
Smoking during pregnancy increases the risk of premature birth, stillbirth and infant death. iStockphoto hide caption
State public health departments have added Web tools to their stop-smoking aids. Eric Audras/PhotoAlto/Corbis hide caption
A woman smokes an electronic cigarette at a store in Miami. Joe Raedle/Getty Images hide caption
Stubbing that little habit out before surgery would be a very good idea. Image Source/Corbis hide caption