MMWR Morb Mortal Wkly Rep. 2013 Sep 6;62(35):729-30.
Electronic cigarettes, or e-cigarettes, are battery-powered devices that provide doses of nicotine and other additives to the user in an aerosol. Depending on the brand, e-cigarette cartridges typically contain nicotine, a component to produce the aerosol (e.g., propylene glycol or glycerol), and flavorings (e.g., fruit, mint, or chocolate). Potentially harmful constituents also have been documented in some e-cigarette cartridges, including irritants, genotoxins, and animal carcinogens. E-cigarettes that are not marketed for therapeutic purposes are currently unregulated by the Food and Drug Administration, and in most states there are no restrictions on the sale of e-cigarettes to minors. Use of e-cigarettes has increased among U.S. adult current and former smokers in recent years; however, the extent of use among youths is uncertain.
电子烟，也称为电子香烟，是一种通过电池供电的设备，通过气溶胶向使用者提供尼古丁和其他添加剂。根据品牌的不同，电子烟弹通常含有尼古丁、产生气溶胶的成分（如丙二醇或甘油）和调味剂（如水果、薄荷或巧克力）。一些电子烟弹中也有潜在的有害成分，包括刺激性物质、遗传毒素和动物致癌物。目前，食品和药物管理局(FDA)对非用于治疗目的的电子烟没有进行监管，而且在大多数州，向未成年人销售电子烟也没有限制。近年来，美国成年现吸烟者和前吸烟者使用电子烟的情况有所增加；然而，青少年使用电子烟的程度尚不确定。
