Effective drugs for the treatment of diseases of the central nervous system, such as multiple sclerosis, do exist. However, the blood-brain barrier, which protects the brain as the body’s control center, makes it especially difficult for therapeutic biomolecules to pass through. Thus, researchers from an international consortium coordinated by the Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB have spent the last four and a half years developing a novel system in the EU project „N2B-patch“ that can be used to bypass this barrier. The new approaches will be presented at a virtual international final symposium on June 17, 2021.