Influenza Viruses (Flu Viruses) Three types of influenza viruses affect people, called Type A, Type B, and Type C. Usually, the virus…
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Chronic Obstructive Pulmonary Disease (COPD): Symptoms
by explainingmedicine June 13, 2016Chronic Obstructive Pulmonary Disease (COPD): Symptoms A type of lung disease marked by permanent damage to in the , making it hard…
