Study to Evaluate the Safety, Tolerability and How IBI3013 is Taken up and Processed by the Body in Healthy Volunteers After Single-dose Administration, and in Non-segmental Vitiligo Patients and Alopecia Areata Patients After Multiple-dose Administration

Evaluation of the Safety, Tolerability, and Pharmacokinetics of Single-dose Administration of IBI3013 in Healthy Adult Trial Participants and Multiple-dose Administration in Active Non-segmental Vitiligo Trial Participants and Severe Alopecia Areata Trial Participants - a Randomized, Double-blind, Placebo-controlled, Dose-escalation Study