Asthma affects more people throughout the world, particularly in more developed countries, than at any other time in evolution and it is estimated that 100 to 150 million people in the world are now affected by it, but it is not a recent phenomenon. The highest incidence of this disease appears in the - UK, Australia, New Zealand and the Republic of Ireland followed by North, Central and South America. [1998 International Study of Asthma and Allergies in Childhood (ISAAC)]. Whereas, the lowest rates were in centres in several Eastern European countries, followed by Indonesia, Greece, China, Taiwan, Uzbekistan, India and Ethiopia.
Rates of asthma in selected developed countries may be summed up as follows (all figures are approximate):
Country |
Asthma Diagnosed (millions) |
Population (millions) |
% |
USA |
20 |
285 |
7.0 |
UK |
5.1 |
60 |
8.5 |
Australia |
2 |
19 |
10.5 |
Ireland |
0.3 |
3.9 |
7.7 |
Globally, asthma is responsible for around 180,000 deaths annually. Some children outgrow their asthma and half of these children will see a lessening of their symptoms as they move into adolescence. Unfortunately, fifty percent of this group will see their asthma return, often when they are in their 30s and 40’s.