ff193b49_rence_Between___Asthma_vs_COPD__Asthma
[Characteristics] Prevalence [COPD] Symptoms are generated inside the respiratory system itself and can be aggravated by a secondary infection. [Asthma] 
Asthma attacks usually occur due to external factors over which you have little or no control – allergens, physical exertion, pollutants, weather etc.
Difference Between Asthma and COPD | Difference Between | Asthma vs COPD
Asthma