They made Mice vape

https://gizmodo.com/e-cig-vapor-might-be-carcinogenic-mice-study-suggests-1822518775
Thats pretty much it....hope it tickled you the same way I did...as far as vaping itself well who actually cares? Nicotine is poison and people pick it....I've picked it...Can't be any worse than breathing in Beijing...A company in Canada literally sells them air.