The core activity of Cellerys AG is the development of therapies for the treatment of autoimmune diseases, particularly multiple sclerosis, through the application of immunotherapies and cell therapies. The company focuses on the development of EpiTCer-based therapies, which aim to modulate the immune response to autoreactive T-cells. Cellerys conducts clinical trials and collaborates with partners such as Novartis and TETEC to develop and market its therapies.