Michael Mosley investigates the dramatic rise in e-cigarettes.

Why did we switch to electronic cigarettes in the first place?

Don't worry, it's normal!

Hollywood star, the cause of girls' tears, and the object of women's dreams: how did Leo the actor transform into Leo the vaper?

Now in its eighth edition, the review is the world's most comprehensive review of e-cigarettes and reaffirmed that e-cigarettes are at least 95% less harmful than regular cigarettes.

E-cigarettes can help some people to quit smoking.