A Study of SCH 697243 in Participants With Grass Pollen Allergy Symptoms, With or Without Asthma (P08067)

Inclusion Criteria: * Must have a clinical history of significant allergic rhinoconjunctivitis to grass (with or without asthma) * Must have a positive skin prick test response to Phleum pratense (Timothy grass) * Must be positive for specific immunoglobulin E (IgE) against Phleum pratense (Timothy grass) * Must have an forced expiratory volume in 1 second (FEV1) of at least 70% of predicted value at Screening \- Safety laboratory tests and vital signs conducted at the Screening Visit must be within normal limits or clinically acceptable to the investigator/sponsor Exclusion Criteria: * Has a clinical history of symptomatic seasonal allergic rhinitis and/or asthma due to another allergen during or potentially overlapping the GPS * Has a clinical history of significant symptomatic perennial allergic rhinitis and/or asthma due to an allergen to which the participant is regularly exposed * Has received an immunosuppressive treatment within 3 months prior to the Screening Visit * Has a clinical history of severe asthma * Has a history of anaphylaxis with cardiorespiratory symptoms * Has a history of self-injectable epinephrine use * Has a history of chronic urticaria and angioedema * Has a clinical history of chronic sinusitis during the 2 years prior to the Screening Visit * Has current severe atopic dermatitis * Is breast-feeding, pregnant, or intending to become pregnant * Had previous treatment by immunotherapy with any grass pollen allergen for more than 1 month within…