I don't know about from a medical position, but I do know there is a lot regarding vaping cannabis and EVALI (lung injuries from vaping). When I was last looking maybe a year ago, majority of vaping related EVALI was related to cannabis and there wasn't enough info on nicotine/nicotine free vaping.

Yeah, I was looking into that because I don’t have dexterity and vaping would be easier for me to hold. But I already have had half the lung capacity. So I’m not worried to mess with vaping. I would, if I was told it’s OK.

So I might sound silly but F it... Bill Nye saves the world has an episode on this exact topic. There are only a few studies and the episode explains why. Also I think they share links to the studies. I watched on Netflix. I'm sure it's still there. I just don't have the time to find the episode because I write a novel in response to a question. lol