Because of a lack of well-conducted epidemiological studies, an accurate prevalence of bronchiectasis is more difficult to estimate than that of asthma and COPD. There has been a decrease in the incidence of this disease, which has been attributed to the increased use of antibiotics for infection control and immunization strategies in children. Tsang and Tipo reported a hospital admission rate of 16.4 per 100,000 people and a mortality rate of 1 out of 100,000 people in Hong Kong