nonsmokers

Nonsmokers are individuals who do not currently smoke tobacco or other inhaled substances. The term can include people who have never smoked (never-smokers) and those who have quit but are not currently smoking (former smokers); definitions vary by context.

In many surveys, a nonsmoker is counted as someone who has not used tobacco in the recent past, while never-smoker refers to someone who has never smoked regularly. Some uses distinguish current, former, and never smokers to categorize risk and behavior.

Health considerations: Regular smoking increases the risk of cardiovascular disease, lung cancer, chronic obstructive pulmonary disease, and other illnesses. Nonsmokers have substantially lower risk for these conditions compared with current smokers. They can still be affected by secondhand smoke, which raises risks for heart disease, lung cancer, and respiratory issues in others, including children and pregnant people. Thirdhand smoke—residual contaminants on surfaces—also poses potential risks to nonsmokers.

Public policy and environments: Many jurisdictions prohibit smoking in workplaces, public buildings, and indoor dining to protect nonsmokers. Smoke-free laws, taxation, product labeling, and cessation support aim to reduce smoking prevalence and exposure.

Social and demographic aspects: The prevalence of nonsmoking varies by country, culture, and regulation. Nonsmokers may be students, workers, or retirees who choose not to smoke for health, personal, or social reasons.

Measurement and usage: In research, defining nonsmoker status can affect study results, and terminology varies; researchers may distinguish never-smokers from former smokers or from those who have simply not smoked recently.