This report provides statistics on COVID-19 preprints processed via the Europe PMC plus manuscript submission system. This report will be updated on a regular basis.
The charts below show the numbers of COVID-19 preprints processed on a monthly, cumulative, and per repository basis. ‘Submissions’ refers to COVID-19 preprints that have been uploaded to the manuscript submission system; ‘indexed’ represents preprints that have been tagged (converted to full-text XML) and the full text is indexed in Europe PMC; ‘displayed’ reflects preprints where the corresponding author has given approval to display the full text on the Europe PMC website. The final chart shows the preprints displayed vs. indexed-only by repository.
N.B. Versions of the same preprint are counted separately.
The chart below shows the license profile, by repository, of the 32,224 COVID-19 full-text preprints tagged and indexed in Europe PMC to date. As different versions of a preprint can have different licenses, the percentages are based on individual versions.
As of 05 May 2021, a total of 32,224 COVID-19 preprints have been tagged and indexed in Europe PMC. Of these, 31,752 have been sent for author approval, of which 22,789 have been approved (71.8%). This comprises 6,518 preprints approved by authors and 16,271 CC-licensed preprints that have been automatically approved after a two week period.
The plots below show the breakdown of percentage of author- and auto-approved preprints by repository, as well as by Creative Commons license type. A table with the full breakdown is also included for reference.
The following two histograms display:
The HTML and PDF page view counts for COVID-19 full-text preprints on the Europe PMC website broken down by repository are shown below.