He was smoking throughout the day
the per-piece dose isnt a one-to-one stand-in for the studied dose
The WHO advises against e-cigarettes, especially for young people

Fire Science Publishers/Society of Fire Protection Engineers, Issaquah, WA Intering C, Refai R (2023) Wildfire ignition potential from cigarettes literature review, Research Report, Project number 301015285, FP Innovations, p 36 Countryman CM (1980), Some physical characteristics of cigarettes as firebrands, Report prepared under Forest Service Contract 43-9AD6-0-755, p 37 Countryman CM (1982) Ignition of grass fuels by cigarettes, Report prepared under Forest Service Contract 43-9AD6-1-617, p 15 Countryman CM (1982) Cigarette temperatures and burning rates, Report prepared under Forest Service Contract 43-9AD6-1-617, p 15 Dainer J (2003) Can cigarette butts start (bush) fires? Forensic Science Honours Project Thesis, University of Technology Sydney Sun P, Zhang Y, Sun L, Hu H, Gao F, Wang G, Zhang H (2018) Influence of fuel moisture content, packing ratio and wind velocity on the ignition probability of fuel beds composed of Mongolian oak leaves via cigarette butts

These refillable versions often come as kits, with recharging cables or USB chargers for example, and some come with sleek, portable carrying cases
Older adults and babies are more at risk of frostbite, as are homeless people, hikers and hunters