This is a dose finding study and no therapeutic study. Patients will receive in 4-weekly intervals 6x 0,5mL of one of 4 different concentrations of Depigoid Phleum. The study is performed outside the pollen season. Thus the aim of the study is not the therapeutic effect of the specific immunotherapy
Immunotherapy is a specific treatment for allergic diseases. Unlike conventional pharmacological treatment, immunotherapy is the only treatment that could modify the natural course of allergic disease. This is a prospective double-blind placebo controlled study with three arms of treatment: placebo