| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| effectiveness of vaccines over time | 1.63 | 0.1 | 8511 | 50 | 35 |
| effectiveness | 1.4 | 1 | 7291 | 9 | 13 |
| of | 1.56 | 0.9 | 9121 | 29 | 2 |
| vaccines | 2 | 0.7 | 6388 | 13 | 8 |
| over | 0.27 | 0.7 | 4591 | 33 | 4 |
| time | 0.9 | 0.8 | 9676 | 79 | 4 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| effectiveness of vaccines over time | 1.22 | 0.8 | 4374 | 35 |
