Studies with smokers with pre-existing respiratory disease switching to ECs is a good clinical model to prove harm reversal, but do not provide any information about the potential for absolute risk from vaping, because of the existing background damage from previous smoking.
The strength of our study was to investigate the effect of vaping on lung health in regular EC users who have never smoked in their life. Given that EC aerosol emissions are much less harmful than tobacco smoke, it is no brainer that vaping is substantially better for the lungs than smoking.
