We have not commented on this small monoclonal antibody before. It is the property of a small company in Vancouver, Washington called Cytodyne. The antibody is an immune system modulator and is apparently effective in reducing the effects of a cytokine storm produced by the body as a reaction to the damage done by COVID-19.

https://losangeles.cbslocal.com/2020/08/18/covid-19-survivor-coronavirus-experimental-drug-leronlimab/