Professor Des Cox:

It is an evolving area. We do not know a lot about it but we know the by-products of e-cigarettes - that is, what is expelled into the air - contain some compounds which have potential to be harmful. That is all we can say at the moment. I do not think there is firm evidence on that. We would be the first ones to be jumping up and down if that was the case. We do not have full oversight of what the impact is but I agree with Dr. McAvoy's point that just like we try to denormalise the behaviour of smoking, we should not expose children to parents who vape. They should try to do that outside of the environment of the child, as a child protection measure. That would be a sensible approach.