Is the delineation too broad? Does CORD-19 include articles that are not relevant to COVID-19 research?

• CORD-19-strict subset includes publications that had a match because from searching their title and abstract, they were found to focus on COVID-19 and coronaviruses
• Found that only a small subset of CORD-19 publications were CORD-19-strict, meaning most publications were not that relevant to COVID-19

Is the delineation too narrow? Are there relevant articles excluded from CORD-19?

• Using the Centre for Science and Technology Studies (CWTS) in-house version of WoS to examine the Science, Social Sciences, Arts & Humanities, and Conference Proceedings Citation Indices to identify relevant publications
• WoS-strict measure similar to CORD-19 strict publications
• The majority of publications indexed by WoS overlapped with CORD-19, which meant that there is currently less of a gap between CORD-19 and other databases’ coverage