Every week seems brings a new story about how vaping is really, really, really bad for you.

Only a few years ago, electronic cigarettes were being hailed as a new and healthier way for people to consume nicotine and pot. The number of vapers worldwide has grown sevenfold since 2011, to an estimated 41 million users. But now, vaping is being attacked as a dangerous trend that's luring teenagers into a deadly habit that might be as bad for you as conventnional smoking.