HLA Demographics Study in Adults With Type 1 Diabetes

Inclusion Criteria: 1. Male and female participants aged ≥ 18 to ≤ 55 years, with type 1 DM meeting American Diabetes Association criteria at diagnosis: 1. Fasting glucose ≥ 126 mg/dL (7.0 mmol/L), or 2. 2-hour oral glucose tolerance test plasma glucose ≥ 200 mg/dL (11.0 mmol/L), or 3. Hemoglobin A1c ≥ 6.5%, or 4. Random plasma glucose ≥ 200 mg/dL (11.1 mmol/L) (with documented classic hyperglycemia symptoms or hyperglycemic crisis). 2. Date of T1D diagnosis within 6 months of the study visit. 3. Able and willing to provide written, informed consent as approved by the institutional review board (IRB). Participants must be able to consent directly; no other person or guardian may consent for them in this study. Exclusion Criteria: 1. Participant is an employee of, or an immediate family member of an employee, of the Sponsor, study site, or of a contractor/vendor who is involved in direct study conduct for this protocol. 2. Participant is unwilling or unable to comply with the study visit assessments.