Public health officials should thoroughly investigate the roots of the recent surge in respiratory illnesses. But before pinning the blame on legitimate e-cigarette manufacturers—and before banning their products—lawmakers should examine how their own heavy-handed approach to overtaxing and overregulating has encouraged consumers to develop dangerous homemade concoctions and buy unregulated counterfeits from the black market — thereby contributing to this “new problem.”

To read this article by Liam Sigaud and Steve Pociask, visit the Wall Street Journal.