An official website of the United States government.

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Concept Breadcrumbs

Preferred Term:

second hand smoke

Secondhand smoke is the combination of smoke from the burning end of a tobacco product and the smoke breathed out by the user. Secondhand smoke contains more than 7,000 chemicals; hundreds are toxic, and about 70 can cause cancer. There is no risk-free level of secondhand smoke, and even brief exposure can cause immediate harm.
Concept Schemes:
Broader Concept:
Entry Terms:
  • environmental tobacco smoke
Download this Concept:
RDF/XMLCreated 2018-07-13, last modified 2020-11-03