What we do know from recent epidemiological evidence from the USA is that those who both vape and smoke are at an additional four-fold increased risk of developing lung cancer, according to Sitas
(PMFTC) (30.51%), followed by Japan Tobacco International (JTI) Asia Manufacturing Corporation (25.42%)
Try to reduce your consumption as much as possible
Vlaski E, Stavric K, Seckova L, Kimovska M, Isjanovska R (2011) Do household tobacco smoking habits influence asthma, rhinitis and eczema among 1314 year-old adolescents
Tobacco use and cancer causation: association by tumour type
Update: Regarding the new regs, you can read Forest's reaction here: Cigarettes sold in plain green packs under new rules (BBC News) New cigarettes packaging rules come into force (ITV News) Stricter cigarette packaging rules come into force in UK (Guardian) Plain cigarette packs 'milestone' as critics claim policy treats smokers like 'naughty children' (The Herald) All cigarettes must be sold in standardised green packets from tomorrow (Press Association) Update: Pat Nurse has also being doing her bit