There are many approved or experimental therapies in development for a range of indications that, because of their mechanisms of action, have been pursued as potential therapies to treat patients with COVID-19. One of the most advanced candidates in this category is lenzilumab, an experimental monoclonal antibody that’s in development for certain cancers and other conditions. The antibody has the potential to neutralize a cytokine known as GM-CSF, which can trigger a severe immune reaction and cause hyperinflammation as a result of a cytokine storm. It is this immune response that underlies the most serious cases of COVID-19 virus. We spoke to Cameron Durrant, chairman and CEO of Humanigen, about lenzilumab, how it was recognized as a potential treatment for COVID-19, and the path forward for the therapy.