Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Asthma is a chronic bronchial disease, affecting millions of people globally. Moreover, it is the most common chronic disease in children. Although the disease has a relatively low fatality rate, it can be deadly – most asthma related deaths occur in countries with low or lower income. Hoverer, asthma is present in all countries regardless of their socioeconomic background. Learn more about asthma, its symptoms and treatment in this book.