Medical News Today -- As many as 300 million people worldwide suffer from asthma and its prevalence is on the rise as societies become increasingly urbanised. The Global Burden of Asthma Report, released in 2004, warns there could be an additional 100 million diagnosed asthmatics by 2025. Worldwide, deaths from asthma have reached more than 250,000 a year and its economic cost is estimated to exceed those of tuberculosis and HIV/AIDS combined.
