Fig. 2
From: The Arab region’s contribution to global COVID-19 research: Bibliometric and visualization analysis
Clustering research topics by mapping Title/Abstract co-occurrences of terms for COVID-19-related publications from the Arab world. Of the 88,868 terms, 570 terms have occurred at least 50 times. A relevance score was calculated for each of the 570 terms and used to choose the 60% most appropriate terms (342 terms). This set of 342 terms was scattered into four different clusters: public health and epidemiology studies (red), immunological and pharmaceutical studies (green), signs, symptoms and clinical diagnosis studies (blue) and virus detection studies (yellow). The map was created using VOSviewer software version 1.6.16