Since its founding, the Castleman Disease Collaborative Network (CDCN) has worked to identify an effective treatment for Castleman disease, a rare immune system disorder that leads to a cytokine storm and multi-organ failure—much like what’s being seen in COVID-19 patients. Here to review how the CDCN’s innovations are now being leveraged toward the fight against COVID-19 is the CDCN’s Co-Founder and Executive Director Dr. David Fajgenbaum.