I've watched this thread with interest and decided I'll add my threepence worth. I work with several individuals who vape, 2 are ex smokers 20yrs plus and 2 youngsters all who vape, aside from the stench of different vapes they all have one thing in common. They are the first to go down with a cold or virus, the youngest at 21 has been referred to respiratory clinic and told to stop vaping as its damaging his lungs faster than if he smoked cigarettes. He was an aspiring junior athlete. The reason hes been given is that the vapes are full of nasty chemicals, some that are used to make them smell / taste nice are actually aggravating / damage the lungs. Whether this is fact or scaremongering or not im not sure. A few yrs agona report came out that whilst dodgy cigarettes contained nasties to bulk them out, vape juice was containing even worse chemicals, formaldehyde was one of the nastier ones. And before anyone moans, yes I did smoke, but quit very quickly many yrs ago having watched what happens when my mum was dying of lung cancer.