Awareness of hazards due to tobacco among people aged 15 years and older in Chongqing, China, in 2020: A cross-sectional analysis.

Introduction: Tobacco smoke contains a large number of harmful substances and carcinogens. Smoking and secondhand smoke cause a variety of cancers and diseases, seriously endangering human health. However, the status and characteristics of the awareness of hazards due to tobacco among people aged ≥15 years in Chongqing, China, are still unknown.