1 doctor weighed in:
How frequently do I have to be exposed to passive smoking before it becomes life threatening?
1 doctor weighed in

Dr. Alan Wartenberg
Addiction Medicine
In brief: Nobody knows
I am unaware of any studies that look for a "dose response curve" for second hand smoke.
Just as with smokers themselves, the exposure probably needs to be daily or near-daily for decades, so it is unlikely that lasting damage (chronic bronchitis, cancer, heart disease) could occur with short-term or low-level exposure, but we simply do not know what is safe. Best to avoid as much as possible.

In brief: Nobody knows
I am unaware of any studies that look for a "dose response curve" for second hand smoke.
Just as with smokers themselves, the exposure probably needs to be daily or near-daily for decades, so it is unlikely that lasting damage (chronic bronchitis, cancer, heart disease) could occur with short-term or low-level exposure, but we simply do not know what is safe. Best to avoid as much as possible.
Dr. Alan Wartenberg
Dr. Alan Wartenberg
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