Secondhand smoke damages the arteries, which can cause stroke or heart attack.

VO: Secondhand smoke enters the throat. And it doesn’t just damage the lungs: Within minutes the smoke activates platelets, which thickens the blood and damages arteries. In time plaque accumulates in the damaged blood vessels, obstructing blood flow to the heart. This can result in stroke or heart attack.
Text: A little secondhand smoke can do a lot of damage. Sponsored by California department of health services.

This ad requires adding a first scene with a smoker and a non-smoker, as only the portion of the ad without talent is licensable. Licensing is free. See "Heart Attack" for a personal consequences adaptation of this ad.