Toxic chemicals from cigarettes remain toxic in secondhand smoke

The dangers of secondhand smoke: A hand holds a smoking cigarette in front of a black background

Mayo Clinic Q&A DEAR MAYO CLINIC: Is secondhand cigarette smoke dangerous to my health? ANSWER: The short answer to your question is yes, secondhand smoke is dangerous. Secondhand smoke — also known as environmental tobacco smoke — is a combination of the smoke coming from a burning cigarette and the smoke exhaled by the smoker, […]