human
I've heard a lot about the dangers of e-cigarettes. Is there any evidence that they're safe?
assistant
There is some evidence that e-cigarettes are safer than traditional cigarettes, but more research is needed to confirm this. Some studies have found that e-cigarettes may be less harmful to health overall than regular cigarettes, while others have shown that they can still contain toxic chemicals and other potentially dangerous substances. More research needs to be done before we can say for sure if e-cigarettes are safe or not.