The purpose of this non interventional study (NIS) was to observe the efficacy of Pollinex® Quattro as a short-term revaccination in patients who have already been successfully desensitized at least five years ago against grass-pollen but developed a recurrent allergy.
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Assessment of the efficacy of Pollinex® Quattro based on the Combined Symptom and Medication Score (CSMS) (Pfaar et al., 2014).
Timeframe: 3 months