This article explains in relatively easy terms the way monoclonal antibodies work and the uses for COVID-19.
Link to the article.
doi: Link
To quote this article in bibliography:
Marovich, Mary, John R. Mascola, Myron S. Cohen . “Monoclonal Antibodies for Prevention and Treatment of COVID-19." JAMA 324, no. 2 (2020): 131-132. https://doi.org/doi.org/10.1001/jama.2020.10245