Researchers from Aberystwyth and Bangor universities are looking at the DNA of grass pollen to find out which types cause the most allergic reactions.
Looking at the DNA of these pollens is a new approach to research, it is hoped it will be more conclusive than the traditional method of using a microscope, which can make it very difficult to see pollen differences.
This information could help the 13 million sufferers of hay fever in the UK to know which types of fields to avoid when in grassy areas.
