What is asthma?

At present, asthma is responsible for one of every 250 deaths worldwide, despite the fact that the treatments are effective in most patients. In the early twentieth century began to use bronchodilators, but was not recognized until 1960 when the inflammation of the airways as a precipitator of symptoms.

The "hygiene hypothesis" argues that children living in an extremely clean environment do not develop properly because defenses do not normally come into contact with stimuli or infections. Therefore when exposed to an irritating, over-react.

Thanks to some research, is beginning to consider asthma as a symptom of different disorders and not a disease itself. While it may seem a step backwards instead of progress, in reality it is an evidence provided by a more scientific knowledge on the subject.