A Longitudinal, Observational Biomarker Study in Participants With Primary Sjogren's Syndrome

Key Inclusion Criteria: For Healthy Volunteers: * In good overall health as determined by the Investigator For Participants With Sicca * Subjects should present with sicca (i.e., dry eyes and dry mouth) at Baseline * Must be willing to undergo a minor salivary gland (labial) biopsy Key Exclusion Criteria: * A history of any clinically significant medical condition, as determined by the Investigator, that may impact study analyses * A chronic or persistent infection human immunodeficiency virus (HIV), hepatitis B, hepatitis C, and/or tuberculosis * Pre-existing connective tissue disease or autoimmune disease, such as systemic lupus erythematosus (SLE), rheumatoid arthritis, systemic sclerosis, or sarcoidosis * Any known contraindications of sialoscintigraphy NOTE: Other protocol defined Inclusion/Exclusion criteria may apply