HuffPost UK reader Terry asked: “Does vaping by an infectious person make spread more likely?”
Ewan Fisher was hospitalised at 16 after being sold flavoured e-cigarettes under age.
Here's how nicotine and marijuana-based e-cigarettes affect you physically and mentally.
A ban on flavoured vaping products would reduce the number of young people using e-cigarettes, suggested Donald Trump.
There have been two US deaths and more than 200 cases of severe lung illnesses linked to vaping and e-cigarettes.
Prominent e-cigarette maker Juul Labs has said it will "create a thriving black market".
But it's still better for your health than smoking, experts agree.
Philip Morris Ltd wants smokers to swap to e-cigarettes and heated tobacco – but are they much safer?