Fig 1.
Publication years of CORD-19 papers.
Fig 2.
Top 20 journals and pre-print servers by number of CORD-19 articles.
Fig 3.
Annual number of publications in CORD-19 and CORD-19-strict.
Fig 4.
Annual number of publications in WoS-strict and the overlap with CORD-19.
Fig 5.
Term map highlighting temporal trends in the contents of CORD-19.
Also compare with the topic words in the S1 Appendix.
Fig 6.
Intensity of the general topics over time.
(a) Relative topic intensity: This can be interpreted as the mean topic intensity per paper. (b) Absolute topic intensity: This can be interpreted as the number of papers per topic.
Fig 7.
Bottom level citation network clustering.
The color of a term reflects the percentage of publications in which the term occurs that belong to a specific cluster. For example, in (a), 39% of the publications that include the term “pandemic” belong to the largest cluster, whereas only 4% of the publications that include the term “protein” belong to this cluster. Compare with Fig A.7 in S1 Appendix. (a) Largest cluster. (b) Second largest cluster. (c) Third largest cluster. (d) Fourth largest cluster. (e) Fifth largest cluster. (f) Sixth largest cluster.
Fig 8.
Top level citation network clustering.
The color of a term reflects the percentage of publications in which the term occurs that belong to a specific cluster. For example, in (a), 46% of the publications that include the term “pandemic” belong to the largest cluster, whereas only 6% of the publications that include the term “protein” belong to this cluster. In (b), only 2% of the publications that include the term “pandemic” belong to the second largest cluster, whereas 54% of the publications that include the term “protein” belong to this cluster. Compare with Fig A.6 in S1 Appendix. (a) Largest cluster (b) Second largest cluster.
Table 1.
Coverage of CORD-19 publications by Altmetric.
Table 2.
Social media events around CORD-19 publications.
Table 3.
Main altmetrics per WoS publication type.
Fig 9.
Immediate altmetric sources: Twitter, blogs and news media.
(a) Twitter. (b) Blogs. (c) News media.