Fig. 1
From: COVID-19-Related manuscripts: lag from preprint to publication
COVID-19-related preprints and journal articles published, by month, January 1, 2020 to December 31, 2021. (a – study based journal articles refers to articles that analyzed data such as observational studies, trials, and meta-analyses. b – non-study based journal articles refers to articles that did not analyze data such as commentaries.)