 6. Subjects with expected clinically relevant symptoms at the timing of the scheduled EEC assessments due to concomitant sensitization, i.e., positive SPT mean wheal diameter at least 3 mm larger than the negative control and a history of allergic response to the causative allergen, at the discretion of the Investigator. Subjects with a positive SPT for cats andor dogs are acceptable if the subject avoids cats andor dogs for the duration of the study. 