Seems this week the 'safe' alternative to tobacco smoking now has a danger of possibly infecting the lungs and injuring or killing people, as stated in a report in America (5 deaths, 450 cases so far) due to chemical exposure with vaping.
It was on the UK news last night, and here is a Sun article about it that has a USA NBC news video. Not heard anything about the UK situation regarding this, as we have a far smaller population than the USA, so should be lesser numbers, so far. But vape users beware....
https://www.thesun.co.uk/news/9881839/e-cigarette-stop-vaping-lung-condition-deaths/