Is emphysema contagious?

No: Emphysema is acquired by a combination of environmental and genetic factors and is especially worsened by any exposure to airborne pollutants and contaminants - ie exposure to tobacco smoking primary and/or secondary and things like asbestos etc. Not by being exposed to those with emphysema.

No: Emphysema is a form of chronic obstructive pulmonary disease (COPD) that involves progressive damage and loss of lung function. Causes are usually environmental (smoking and pollutants), but genetic factors can predispose or protect from developing the condition. Lung infections (eg, chronic tb) can also lead to damage to the lungs, but not usually to the pattern of lung injury we call emphysema.

No: No, it's primarily caused by smoking, and other factors listed by the other physicians who answered here. If you're concerned about those around you getting the disease, and they smoke, then encourage them and help them to stop smoking.

No...: Emphysema is a form of copd, chronic obstructive pulmonary disease. It is usually caused by smoking and it is not contagious.