Passive smoking—the inhalation of smoke from another's smoking—i

Passive smoking—the inhalation of smoke from another's smoking—is a cause of lung cancer in nonsmokers. A passive smoker can be classified as someone living or working with a smoker. Studies from the U.S., Europe, the UK, and Australia have consistently shown a significant increase in relative risk among those exposed to passive smoke. Recent investigation of sidestream smoke suggests that it is more dangerous than direct smoke inhalation.

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• 10–15% of lung cancer patients have never smoked. -JoshuaChow- ♂ (330 bytes) () 10/26/2010 postreply 08:42:37