The results suggest that such alternatives do not worsen respiratory health when used as substitutes for combustible cigarettes
Yes, third-hand smoke is a complex mix of toxic chemicals that can embed into surfaces and fabrics, posing health risks even after active smoking ceases
They almost certainly pose substantially less harm than smoked products. In fact, the UK government watchdog Public Health England concluded in August 2015 that vapour products are around 95% less hazardous to human health than tobacco cigarettes, based on a review of the available evidence
However, it is associated with significant incidences of infusion reactions, anaphylaxis, methemoglobinemia, and hemolysis, particularly in patients with glucose-6-phosphate dehydrogenase (G6PD) deficiency
However, in some parts of Asia and other regions, you may find packs with 10, 25, or even 30 cigarettes