Simply put: if they do not harm themselves, or others, and if vaping does not prevent them from following the Christian principles, solidarity, and charity, then they are not doing any wrong, or at least not committing any sin for which they cannot be forgiven
"Making cigarettes and other combusted tobacco products minimally addictive or nonaddictive would help save lives." The FDA funded a randomized trial published in 2018 that found "reduced-nicotine cigarettes versus standard-nicotine cigarettes reduced nicotine exposure and dependence and the number of cigarettes smoked." Another FDA-funded study found that, if a nicotine reduction policy were enacted in 2020, it could result in more than 33 million people not becoming regular smokers, and prevent more than 8 million deaths from tobacco-related illnesses by 2100
The negative symptoms are defined as a reduction or lack of normal behaviors associated with normal functioning, such as social functioning, motivation, and personal expression
A cold body is more prone to illness