As preprints, papers hosted on bioRxiv are not peer-reviewed (though submissions may be undergoing peer review and peer reviews from other sources may be posted alongside preprints). However, all submissions undergo a basic scrutinization process, which includes safeguarding checks, an automated plagiarism screening and an assessment of appropriateness. Moreover, readers may post comments.
It has been measured that two thirds of the papers posted in bioRxiv are later published in peer-reviewed journals.[6] BioRxiv, and its sister site, medRxiv, have been major sources for the dissemination of COVID-19 research.[7][8]