The Leipzig Immune ONcology (LION) Conference will focus on the latest developments in immune oncology and provide a forum for leading scientists, clinicians, and industry professionals to exchange ideas and discuss new findings in this exciting field. In addition to a stimulating scientific program, the conference will feature networking opportunities, including a welcome reception and poster sessions, as well as a related virtual exhibition. The LION Conference is organized by the Fraunhofer Institute for Cell Therapy and Immunology IZI and the University Hospital Leipzig.