Asthma is a major noncommunicable disease characterized by recurrent attacks of breathlessness and wheezing, which vary in severity and frequency from person to person. Symptoms may occur several times in a day or week in affected individuals, and for some people become worse during physical activity or at night. During an asthma attack, the lining of the bronchial tubes swell, causing the airways to narrow and reducing the flow of air into and out of the lungs. Recurrent asthma symptoms frequently cause sleeplessness, daytime fatigue, reduced activity levels and school and work absenteeism. Asthma has a relatively low fatality rate compared to other chronic diseases. Facts about asthma WHO estimates that 235 million people currently suffer from asthma. Asthma is the most common noncommunicable disease among children. Most deaths occur in older adults. Asthma is a public health problem not just for high-income countries; it occurs in all countries regardless of the level o...