Application of the patient‐self (P‐S) test to assess the specificity of hyposensitization with Allpyral‐G

Summary Following hyposensitization with Allpyral‐G 5‐grass mix the level of blockingantibody is assessed against the 5‐grass mix, against Timothy (one of the grasses) and against Meadow Grass (not included in the five grasses) respectively and the results compared. The implications are that only very limited protection is given against a grass pollen other than those used for the hyposensitization and this confirms laboratory findings that there is minimal cross‐reactivity between grass pollen allergens.