There is a great quantity of on-going research into asthma and associated allergies, but how do such allergies begin? In recent years scientists have made large strides towards discovering how our immune systems malfunction—ultimately attacking substances which are not harmful. The science behind those mechanisms is complex, involving multitudes of small molecules which play individual roles in various allergic diseases.
A number of theories exist attempting to explain why allergies initially occur (i.e. why the body’s immune cells decide to attack a particular allergen). These theories range from genetic to environmental, but there is no conclusive mechanism.