Source: Roy Morgan Research. Affecting 11% of the adult population (or 2 million people), asthma is one of the more prevalent lung/breathing conditions in Australia, third only to hay fever (26%) and snoring (19%). Between October 2014 and September 2015, more than half (51%) of Aussie adults with asthma reported experiencing hay fever at some point in the previous 12 months. Almost one-third (30%) of asthmatics reported that they also snored, while 13% came down with bronchitis in that time