Corpus downloaded from PubMed 20th April: 5228 publications. There were 853 keywords that occurred in three or more manuscripts. These divided into four main clusters.
Cluster descriptions
Cluster 1 could be called «A global virus pandemic» and includes terms like (beta)coronavirus infection, viral pneumonia, disease outbreak and public health. This cluster contains 2 major topics: a) “preventive epidemiology”, which in addition to the terms like disease outbreak and public health includes terms like travel, global heath and civil defence and b) “care management” which includes terms like infection control, practice guidelines and health personnel
Cluster 2 could be called “disease epidemiology” and includes terms like epidemiology, outbreak, infection, infectious diseases, novel coronavirus pneumonia, treatment and transmission. This is a small cluster with only this major topic
Cluster 3 could be called “pathophysiology and origin” and includes terms like SARS, animals, zoonosis, antiviral agents, viral genome, phylogeny and chiroptera. This cluster contains to major topics: a) “viral biology” which in addition to terms like SARS, animals, viral genome, phylogeny and chiroptera includes terms like spike glycoprotein and peptidyl-dipeptidase a and b) “drug treatment” which in addition to the term antiviral agent contains terms like traditional Chinese medicine, chloroquine and lopinavir
Cluster 4 could be named “clinical epidemiology” and contains terms like mortality, age, gender, clinical laboratory techniques and fever. Also in this cluster, there is only this major topic.
Cluster 5 could be named “related topics” and contains terms like mental health and anxiety and depression one side , but also terms like surveys and questionnaires, cross-sectional studies and health knowledge; attitudes and practice on the other. This is the smallest cluster with only one topic
Table of ten most central keywords in each cluster
(Centrality measure used is weighted degree centrality)
| Cluster 1 (Red) | Cluster 2 (Green) | Cluster 3 (Blue) | Cluster 4 (Yellow) | Cluster 5 (Purple) |
| coronavirus infection | pneumonia | sars | female | mental health |
| viral pneumonia | epidemiology | animals | male | health knowledge, attitudes, practice |
| betacoronavirus | outbreak | zoonosis | adult | anxiety |
| pandemic | infection | antiviral agents | middle aged | depression |
| china | infectious diseases | genome, viral | aged | fear |
| disease outbreaks | novel coronavirus pneumonia | phylogeny | clinical laboratory techniques | social support |
| public health | treatment | chiroptera | young adult | anxiety disorders |
| travel | transmission | spike glycoprotein, coronavirus | children | emotions |
| epidemic | prevention | peptidyl-dipeptidase a | adolescent | health status |
| global health | inflammation | viral vaccines | tomography, x-ray computed | resilience, psychological |
VOSViewer files:
To open the map directly in VOSviewer, please use these two files.
CoOccurrance3Inst1Resol20thApril20NET
CoOccurrance3Inst1Resol20thApril20MAP
The maps are created with the following “thesaurus” to clean the data: Thesaurus13thApril