I'll take that question in two parts.
First of all, nicotine is extremely addictive if it comes in a high concentration and is combusted and delivered in the way that cigarettes deliver it. That's our known way in which it becomes addictive, and people have great difficulty stopping. The second, obviously, is chewing tobacco, which again has very high rates of nicotine absorption.
With vaping devices, if they aren't regulated the way we would regulate them, then people could find themselves getting addicted because we haven't regulated the strength of the liquids. We haven't regulated how it's manufactured. We haven't regulated how the device delivers nicotine or where it's used. We haven't created that control in the way that we have regulated alcohol as to where and how it can be consumed and what the concentrations are. We have to get to that, and we'll have to do the same thing with cannabis.
Yes, there will be a risk of people getting addicted, but as I had mentioned earlier, from a harm perspective the absolute harm from nicotine is, as Flory talked about, a relative risk.
Let's say cigarette harm is at a certain level. If a smoker moved completely to vaping and nothing else, they would bring their harm down to a lower level. If they quit completely, they would bring it down lower, to here. For a non-smoker, their harm is here. If they take up nicotine, they've just bumped their harm up to here.