Inclusion Criteria:  Participants will be healthy people over 18 years of age. Allergic participants should have an allergic reaction against Alternaria, visible in the Skin-Prick-Test. Furthermore symptom data in the pollen diary of the Austrian Pollen Information Service should be existing  Exclusion Criteria:  Subjects participating in a pharmacological study, pregnant subjects and subjects with an existing infectious- and/or autoimmune disease