| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| studies of vaccine safety | 1.62 | 0.5 | 310 | 7 | 25 |
| studies | 0.29 | 0.6 | 5746 | 74 | 7 |
| of | 1.21 | 0.2 | 5386 | 8 | 2 |
| vaccine | 0.87 | 0.2 | 6642 | 95 | 7 |
| safety | 0.7 | 0.1 | 1370 | 67 | 6 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| studies of vaccine safety | 0.14 | 0.3 | 3584 | 95 |
