E-cigarettes evaporate a nicotine-containing liquid and are therefore deemed less harmful to health than traditional cigarettes. They can also help with smoking cessation. Opponents emphasize the risk of easier entry as well as the simple increase of the nicotine dose. In addition, increased risk of vascular disease, myocardial infarction or stroke is still associated with vaping. Advocates and opponents hold never-ending debates on health implications, psychological and economic effects. Both sides refer to scientific results. Genuine long-term studies are still missing.