What we don’t know about vaping can hurt us

Many people, including health professionals, have assumed that e-cigarettes are safer than traditional cigarettes because they use heated liquid vapor (hence the term “vaping”) rather than burning tobacco leaves in a process that has been proved to be carcinogenic. But “safer” doesn’t mean “risk-free.” A troubling increase of acute lung disease among e-cigarette users across 25 states is making the sobering point that there is still a lot we don’t know about the health implications of vaping.