Although the effects are unclear, electronic cigarettes contain Nicotine which is associated with cardiovascular disease, potential birth defects, and poisoning
Every year, thousands of non-smokers die from heart disease and lung cancer and hundreds of thousands of children suffer from respiratory infections because of exposure to secondhand smoke
Smoking bans aim to reduce public exposure
The authors, led by Chris Bullen of the University of Auckland in New Zealand, said the difference was not statistically significant.
Keep in mind that skipping inhalation lowers some risk but does not remove it, since cigars still contain nicotine and carry real health concerns covered in our overview of whether cigars are bad for you.
Soldiers in World War II even received cigarettes to clean their lungs