| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| peer review covid vaccine studies | 1.64 | 1 | 8072 | 32 |
| peer review journal articles covid 19 vaccine | 0.27 | 1 | 1023 | 95 |
| covid vaccine peer reviewed articles | 0.63 | 0.8 | 5379 | 15 |
| peer reviewed articles on covid vaccines | 1.22 | 0.3 | 4952 | 21 |
| covid vaccine research study | 0.62 | 0.9 | 5148 | 23 |
| studies on covid vaccine | 0.94 | 0.3 | 2914 | 8 |
| covid vaccine studies scholarly articles | 1.37 | 0.4 | 4896 | 48 |
| research on covid vaccine | 0.99 | 0.3 | 9211 | 21 |
| covid vaccine effectiveness studies | 1.62 | 1 | 2816 | 58 |
| recent covid vaccine studies | 1.23 | 1 | 4196 | 48 |
| covid vaccine research paper | 0.64 | 1 | 7575 | 75 |
| covid vaccine health study | 1.03 | 0.2 | 3656 | 15 |
| research on covid vaccine effectiveness | 1.59 | 0.5 | 7610 | 14 |
| scholarly articles on covid vaccine | 1.58 | 0.1 | 382 | 96 |
| effectiveness of covid vaccine study | 0.87 | 1 | 8045 | 36 |
| harvard study on covid vaccines | 0.59 | 0.6 | 354 | 88 |
