FDA recognizes the substantial public interest in medicines that are being studied for the prevention or treatment of COVID-19, especially those medicines that may provide a benefit to patients with the most severe forms of disease that can result in respiratory failure and death. Leronlimab, a monoclonal antibody investigational drug under development by CytoDyn, Inc. (CytoDyn), is one of the potential medicines that has been studied to determine whether it is safe and effective in treating patients with COVID-19, including those with severe outcomes from COVID-19.

CytoDyn has conducted two separate clinical trials investigating leronlimab for the treatment of COVID-19. A smaller trial, titled CD10, which included 86 patients, studied leronlimab's effect on mild-to-moderate COVID-19 disease. A larger trial, titled CD12, which included 394 patients, studied leronlimab's effect on severe symptoms of respiratory illness associated with COVID-19. CytoDyn has communicated information to the public about the results of these trials. Although FDA generally cannot disclose confidential information about unapproved products, we have concluded that given the significant public interest in leronlimab, it is important to provide summary information about the status of the CytoDyn development program.

With the conclusion of both the CD10 and CD12 clinical trials, it has become clear that the data currently available do not support the clinical benefit of leronlimab for the treatment of COVID-19.