The best way to avoid developing lung cancer or other smoking-related illness is to not smoke in the first place or quit smoking as soon as possible
FASEB J 29(7):29122929 Wiegman CH, Michaeloudes C, Haji G, Narang P, Clarke CJ, Russell KE, Bao W, Pavlidis S, Barnes PJ, Kanerva J, Bittner A, Rao N, Murphy MP, Kirkham PA, Chung KF, Adcock IM, Copdmap (2015) Oxidative stress-induced mitochondrial dysfunction drives inflammation and airway smooth muscle remodeling in patients with chronic obstructive pulmonary disease
For younger brains that are still developing (under 25), vaping can cause mood disorders, impulse control problems, and increase potential for addiction to other drugs by rewiring their brain and harming their brain development (NIDA, CDC)
A company must get approval from the Food and Drug Administration before putting its vape device on the market