Mould, dust and animals can all cause hay fever symptoms. But the main culprit is rye-grass pollen, according to Cenk Suphioglu, an associate professor of Biomedical Science at Deakin University.

Thunderstorm asthma is mostly likely to impact persons with seasonal allergic rhinitis who have elevated rye grass pollen immunoglobulin E concentrations and poor asthma control. Targeted ...