Table 8.
Topic centralities in the COVID-19 research information network.
| Research topic | Degree | 2-local eigenvector | Eigenvector |
| COVID-19 vaccine | 73.269 | 2408033 | 0.943 |
| COVID-19 variants | 19.808 | 825399 | 0.323 |
| COVID-19 | 6.231 | 203066 | 0.079 |
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