This clinical trial is focused on studying the effects of a treatment called PQ Grass in children and adolescents who suffer from seasonal allergic rhinitis or rhinoconjunctivitis caused by exposure to grass pollen. These conditions are commonly known as hay fever, which can cause symptoms like sneezing, runny nose, and itchy eyes during certain seasons when grass pollen is in the air. The treatment being tested, PQ Grass, is given as an injection under the skin and is designed to help reduce these allergic reactions over time.
The purpose of the study is to evaluate how effective and safe PQ Grass is for children and teenagers with these allergies. Participants in the study will receive either the PQ Grass treatment or a placebo, which looks like the treatment but does not contain the active ingredient. The study will be conducted over several years to see if the benefits of the treatment last even after stopping the injections. During the study, participants will have regular check-ups to monitor their health and any changes in their allergy symptoms.
Throughout the trial, participants will be asked to visit the study site for assessments and to receive their injections. The study aims to provide valuable information on whether PQ Grass can offer long-term relief from grass pollen allergies in young people. This research could potentially lead to better treatment options for those affected by seasonal allergies.
Bulgaria 
Czechia 
Germany 
Lithuania 
Poland 
Romania 
Slovakia 
