Comparison of a glutaraldehyde‐modified pollen–tyrosine adsorbate with an alum‐precipitated pollen vaccine in the treatment of hay fever

Summary Nineteen patients with hay fever symptoms received nine weekly injections of a pyridine-extracted alum-precipitated grass pollen vaccine (Alavac P). The results were compared with a group of twenty patients who received a three injection series of a glutaraldehyde-modified pollen–tyrosine vaccine (Pollinex). In both groups 65% had a subjective improvement in their symptoms and no significant difference in symptom scores was obtained throughout the pollen season. In the Pollinex group a lower incidence of systemic side effects was recorded.