Adult-onset asthma. The condition affects 10% of all adults, and you can develop it no matter who you are. Believe it or not, the latest international guidelines for asthma treatment found that the majority of people suffering from asthma are not using their inhalers correctly. There are in fact 2 types of inhalers -- rescue and daily -- and you need to know the right time for using each. Meanwhile, in 2018, a Japanese asthma specialist unveiled a groundbreaking method for inhaler use. Find out how to manage adult-onset asthma.