Humanigen, Inc. announced it has completed enrollment for its pivotal phase 3 study of lenzilumab for COVID-19. The Company expects to announce top-line data in March 2021. The primary objective of this Phase 3 randomized, double-blind, placebo-controlled clinical trial, which enrolled 520 patients, is to determine whether lenzilumab in addition to current standard of care can alleviate the immune-mediated cytokine release syndrome (CRS) and improve ventilator-free survival in hospitalized and hypoxic patients with COVID-19 pneumonia. Humanigen's investigational treatment lenzilumab, a proprietary Humaneered® anti-human granulocyte macrophage-colony stimulating factor (GM-CSF) monoclonal antibody, is designed to prevent and treat cytokine storm, a complication believed to be a cause of the acute respiratory distress syndrome (ARDS) that can result in invasive mechanical ventilation and death in certain COVID-19 patients. Data showed that almost 90 percent of hospitalized patients with COVID-19 are at risk of this immune hyper-response.