I fear that it might take a little more than banning vapes to make the country healthier.
Phase out cigarettes, phase out vapes. We have to do something. Although I agree more is needed. No doubt education from an early age.
Yes, get rid of ciggies first, I know a lot if people have found vapes helpful for stopping smoking.
Ban single-use vapes, get rid of all the fancy flavours and then possibly look at offering vapes by prescription.
Some flavouring is probably ok at least until cigarettes are far less accessible than they are currently, but they could do a lot around how they are marketed. Plain packaging, plain names & non-flowery descriptions (i.e. “Strawberry & Apple - fruit, medium tart, medium sweet” ok, “Dragonz Dreamz - juicetastic swirls of tangtastic crunchy orchard apple and plumptious sweet strawberries lifting you to a magical realm” not ok).
They probably don’t need to be prescription only, as you want people to find it super-easy to switch, but there’s a decent case for making them pharmacy only. Maaybe allow off-licenses to sell them, though this rather reinforces the sense of a fun recreational thing & they’d end up being bought to try at parties.
Whilst you’re at it, phase out alcohol and provide education from a young age that is one of the most destructive drugs.
They’ll have to make the rest of life far more enjoyable before removing alcohol. And even then.
