World health organization

10 facts on second-hand smoke

No smoking area sign on a glass door
WHO/Marta Seoane

Fact 5

Separate or ventilated smoking areas do not protect non-smokers from second-hand smoke. Second-hand smoke can spread from a smoking area to a non-smoking area, even if the doors between the two areas are closed and even if ventilation is provided. Only 100% smoke-free environments provide effective protection.

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