Study to Assess the Efficacy of Anti-Bet v 1 Monoclonal Antibodies in Adults to Reduce Symptoms of Seasonal Allergic Rhinitis

Key Inclusion Criteria

1. Documented or participant-reported history of birch pollen-triggered allergic rhinitissymptoms, with or without conjunctivitis, for at least 2 years
2. Positive Skin prick test (SPT) with birch pollen extract in the screening period, asdefined in the protocol
3. Positive Allergen-specific IgE (sIgE) tests for birch pollen and Bet v 1 in thescreening period, as defined in the protocol
4. Willing and able to comply with clinic visits and study-related procedures

Key Exclusion Criteria:

1. Participation in a prior REGN5713-5714-5715 clinical trial
2. Recurrent or chronic rhinitis or sinusitis not associated with birch pollen season, ordue to daily contact with other allergens causing symptoms that are expected tocoincide with birch pollen season, as assessed by the investigator
3. Participants who anticipate major changes in allergen exposure in their home or workenvironments that are expected to coincide with the study assessments as assessed bythe investigator
4. Persistent chronic or recurring acute infection requiring treatment with antibiotics,antivirals, or antifungals, or any untreated respiratory infections (at the discretionof the investigator) within 4 weeks prior to screening visit. Participants may bere-evaluated for eligibility after symptoms resolve
5. Documentation of active SARS-CoV-2 infection, as defined in the protocol
6. A clinical history of asthma with 2 or more asthma exacerbations requiringhospitalizations or systemic corticosteroids in the previous year
7. History of birch allergy immunotherapy as defined in the protocol
8. Use of anti-IgE or other biological therapy in treatment of asthma or allergy within 6months prior to screening NOTE: Other protocol defined Inclusion/Exclusion Criteria apply