While often marketed as a less harmful alternative to smoking, e-cigarettes do have potential health risks, especially with prolonged use
Benjamin Rush (early American physician, signer of the Declaration of Independence, Surgeon General under George Washington, and anti-tobacco activist) was "against the habitual use of tobacco" because he believed it "led to a desire for strong drink, was injurious both to health and morals, is generally offensive to" nonsmokers, "produces a want of respect for" nonsmokers, and "always disposes to unkind and unjust behavior towards them"
Here are just some examples: Nearly half of all chronic smokers die from a smoking-related condition Smoking is the single biggest cause of cancer in the world Smokers under 40 are 5 times more likely to have a heart attack than non-smokers Lung, tongue, throat, tonsil, oesophagus, bladder, kidney and stomach cancers are all more common in smokers For more information, see what are the effects of smoking
Supreme Court, however, ruled in 1912 that the arrangement was illegal