E-cigarette smoke damages DNA and reduces repair activity in mouse lung
pnas.org
pnas.org
They really fail to emphasize this fact clearly. There's a popular delusion that e-cigarette users believe e-cigarettes are completely safe. I think most know they're not entirely safe, but a 97% reduction in harm is a pretty big win.
It's telling that the headline is 'E-cigarette smoke damages DNA and reduces repair activity in mouse lung' and not 'E-cigarettes 97% less harmful than tobacco cigarettes.' Finding evidence that they're wildly less harmful isn't as sexy as being able to say you've found evidence that there's some harm possible.