Windy,
Yes, quitting could very likely have something to do with it. As a smoker your body is constantly fighting to repair the damage smoking causes. Smoking has also been shown to suppress immune function however the mechanism is not yet fully understood by researchers. This immune suppression has been linked to an increase in severity of symptoms and complications when smokers get a cold or the flu.
As for those with asthma, as a smoker, it makes you more sensitive to environmental triggers. Some studies also suggest that smokers are twice as likely to develop asthma than non-smokers.
Danielle
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The SSC Support Team