Designing immunotherapeutics, drugs, and anti-inflammatory reagents has been at the forefront of autoimmune research, in particular multiple sclerosis, for over 20 years. Delivery methods that are used to modulate effective and long-lasting immune responses have been the major focus. This Special Issue focused on delivery methods to be used for vaccines, immunotherapeutic approaches, drug design, and anti-inflammatories and their outcomes in preclinical studies and clinical trials.