Table 3.
Top 20 keywords in terms of frequency of occurrence and the corresponding total link strength.
| Rank | Keyword | Occurrences | Total link strength |
|---|---|---|---|
| 1 | trained immunity | 678 | 2982 |
| 2 | innate immunity | 264 | 1270 |
| 3 | infection | 245 | 1232 |
| 4 | inflammation | 201 | 899 |
| 5 | protection | 167 | 895 |
| 6 | activation | 147 | 674 |
| 7 | nonspecific protection | 146 | 841 |
| 8 | macrophages | 146 | 738 |
| 9 | memory | 145 | 743 |
| 10 | expression | 144 | 522 |
| 11 | innate immune memory | 143 | 634 |
| 12 | bcg vaccination | 133 | 756 |
| 13 | cells | 125 | 569 |
| 14 | covid-19 | 121 | 565 |
| 15 | dendritic cells | 117 | 492 |
| 16 | monocytes | 113 | 602 |
| 17 | bcg | 112 | 690 |
| 18 | vaccination | 104 | 532 |
| 19 | responses | 100 | 463 |
| 20 | reinfection | 94 | 558 |