COPD is related to widespread diseases of a human. In the USA the tendency to increased incidence of COPD is marked: only for last period this indicator has increased by 25% in men and by 69% in women. The next years the further growth of disease is predicted. Epidemiological data related to disease incidence and death rate often underestimates importance and prevalence of COPD, as usually it is not diagnosed before clinically manifested and relatively severe stages of the disease develop. According to the American respiratory society, only 25% of disease cases are diagnosed in due time. In the USA COPD incidence grow near 15 million persons.

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