Cigarette Smoke Can Prevent Allergies, Study Suggests

Matt's comment:  Could it be that it is the exposure to small amounts of smoke, not necessarilty cigarette smoke that helps alergies?

ScienceDaily (May 18, 2009) — Everyone knows that smoking can kill you, but new research suggests that it may help with your allergies. A study of mouse mast cells shows that cigarette smoke can prevent allergies by decreasing the reaction of immune cells to allergens.

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