Thats because smokers (and vapers) in large part control their uptake of nicotine, and because other factors account for a big part of a cigarettes powerful nicotine delivery
Centers for Disease Control and Prevention, [accessed 3 December 2024] [2] In U.S., Smoking Rate Hits New Low at 16%, Gallup.com, July 24, 2018
Echoing that, the EPA says filters rated MERV 7 to 13 are likely to be nearly as effective as true HEPA filters at controlling most airborne indoor particles. The higher end of the range, MERV 11 to 13, removes about 20% to 50% of the very smallest, 0.3- to 1.0-micron particulates
At auctions, the price is normally increased in increments of 10 per cent to the nearest amount of 100, 1,000 or 10,000
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