We don't actually know that yet. The main studies are still ongoing, because this tends to be the kind of thing you measure over decades, and we haven't had those yet.

Does it increase the risk of Alzheimers? Does it riddle your brain with cancer at a later stage?

We don't know.

We do know that it is short-term less harmful, than something where most of the concerns are long-term.

I suspect (anecdote) vaping is just as bad if not worse. People vape EVERYWHERE. Almost any place you can't smoke, people still vape. So - that it happens that way makes me think the total exposure is a lurking problem.

I actually do not know if this is true.