Virus and Asthma

Asthma is an inflammatory disease of the airways that affects more than 300 million people around the world.In both children and adults, viral respiratory infections are the most common cause of asthma exacerbations.In bronchial asthma, respiratory viral infection involves several issues: (1) Respiratory virus infection in infancy is associated with asthma later in life; (2) Respiratory virus infection is associated with acute exacerbations of bronchial asthma; and, (3) Glucocorticosteroids (GC) are ineffective for controlling asthma-related symptoms.The purpose of this review is to provide a comprehensive overview of the role of viruses in asthma exacerbations, as well as the main inflammatory cells, mediators, and molecular pathways involved in asthma immune responses.Additionally, it highlights novel therapeutic targets for managing virus-induced asthma based on current clinical and epidemiological research.