Our bodies, and the whole universe, really, are magnificent creations, impossibly complex. The product of a brilliant mind, not an accident or millions of them. I quit this past May and by August tests showed I had doubled my lung capacity from before quitting. I will never be rid of emphysema completely but my condition has been downgraded to mild and I rarely need inhalers anymore. I have not delved into the reliability validity aspects of this study, but this seems highly improbable to me for the majority or more specifically, I think there is a crucial point unclear if amount and duration where one’s smoking becomes irreversible around problematic outcomes and I am not sure this study took this into account.