is asthma and copd beacome largest killer diseases deu to smoking ?

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this two diseases is most commonly one airway diseases and now a days 98% people are cigarette smokers and pollution is also more in the atmosphere .now in market not a single drug which cure the diseases but it only control .sign is coughing and wheezing.its mainly occur by the hypersensitivity reaction which causes inflammation on bronchus which blocks the airways and difficulty in breathing .