Background & motivation medRxiv, as the preprint repository for papers in the medical, clinical, and related health sciences,1 has become a central source of new studies related to the COVID-19 pandemic. As a result, more and more researchers have begun to include medRxiv in the list of bibliographic databases they search as part of systematic reviews, a type of study that aims to find and bring together all available evidence on a topic in order to provide a comprehensive answer to a research …