Figure 3From: Clinical validation of controlled grass pollen challenge in the Environmental Exposure Unit (EEU) Total Symptom Scores (TSS) were higher in the higher pollen concentration group (HPC) than the lower pollen concentration group (LPC) after three hours of pollen exposure. The second day of pollen exposure in both groups resulted in similar peak TSSs after 3 hours of exposure as the day previous, but generated a more rapid increase in TSS.Back to article page