Asthma is one of the most common chronic diseases, affecting approximately 300 million people around the world.
Asthma prevalence rates vary in different countries, 18.4% being the highest, 0.7% the lowest.
The disease is more prevalent in developed countries than in developing countries.
Every year, Hong Kong has about 70 to 90 deaths caused by asthma attacks; among them, 20 to 30 people passed away in their prime (aged between 15 and 44).
Fatal asthma attacks are mainly caused by delayed treatment as patients do not have a proper understanding of the severity of the disease.
Patients and their families often become very frustrated because of this medical condition.