cotinine levels chewing tobacco Baseline adjusted nicotine measured in the blood plasma of adult The distribution of cotinine level

Respiratory conditions Smoking is the most important risk factor for chronic obstructive pulmonary disease (COPD) and around half of smokers will develop the disease

HEPA filtration plays a crucial role in trapping these particles, including the harmful residue from both tobacco and secondhand smoke

Source: University College London, Top-line findings on smoking in England from the Smoking Toolkit Study Vera Buss, Robert West, Loren Kock, Dimitra Kale, Jamie Brown Between 2011 and 2021, the proportion of adult smokers in the UK decreased by 4.7 percentage points

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