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Notes and references Updated June 2018 * National and state-level prevalence numbers reflect the most recent data available

Second, your lungs have to work very hard to remove tar from the lung, which eventually starts to damage the structures in the lungs, including the alveoli which are responsible for oxygen and carbon dioxide exchange into the bloodstream

However, for people with autoimmune conditions who have an overactive immune system, this may be a benefit

He said there was a real opportunity to minimise such harms by adapting the strategies that have proved to be effective in reducing smoking incidence and prevalence in the general population.