Passive smoking reduces Parkinson's risk

Abstract

"This case control study shows that passive smoking is associated with a reduced risk of Parkinson's. A previous study has shown similar reduction in risk if both parents smoked. Whilst a protective effect of cigarette smoke has long been suspected, this not yet prove. What is certain is that regardless of its role in Parkinson's, smoking causes a large number of other illnesses including heart disease, stroke and cancer."