Millions of people around the world suffer from asthma, which is a chronic disease of the lungs.
When exposed to triggers such as dust, smoke, mould, those with asthma will find it difficult to breathe due to their airways becoming inflamed and narrow.
Common symptoms of asthma include coughing, wheezing, shortness of breath, and/or chest tightness - with the condition being life-threatening for some people.
