Tobacco smoke is an irritant which excavation asthma in asthmatics. But does it also cause or aggravate asthma? Literature review.
Evidence from:
J Bousquet and AM Vignola. Allergy. June (2001) Vol. 56 # 6 p 466.
None of the reports can demonstrate with any certainty that new cases of asthma were not simply cases that no-one had noticed before.
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