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Emphysema (a chronic condition that affect the lungs which cause the loss of the natural elasticity of the lung's air sacs) is very rare in young people (most common among people aged 50 and older. Those with inherited emphysema may experience the onset as early as their thirties or forties) but the incidence steadily increases as people grow older, particularly during or after middle age. This is believed to be due in large part to the cumulative effect of smoking on the lungs. One person cannot catch it from another. Emphysema is more common in men than it is in women, probably because more men smoke cigarettes than women. However, it is believed that this difference will become smaller because more teenage girls and young women are smoking cigarettes today than years ago. Heavier smoking among men over the past several decades is believed to account for the present imbalance in numbers.

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13y ago

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