Are most people born with asthma?

Asthma is not something people are typically born with. It is a chronic respiratory disease that can develop at any age, but it is most often is diagnosed in childhood. Asthma causes the airways to become inflamed, narrow and produce extra mucus, which makes it difficult to breathe. The exact causes of asthma are not fully understood, but it is thought to be related to a combination of genetic, environmental and lifestyle factors.