The GRASS Trial

Am I eligible?

The GRASS trial is open to both men and women. To be eligible, you must:

• Be between 18 and 65 years old.
• Have experienced hay fever for at least two years.
• Experience peak hay fever symptoms in May, June or July.

Please note that certain serious illnesses and other conditions may preclude certain individuals from participating.

If you believe you may be eligible to participate, please go to the Apply page and fill in the form.