| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| history of mrna vaccine | 1.2 | 0.8 | 5492 | 77 | 23 |
| history | 0.93 | 1 | 2587 | 95 | 7 |
| of | 1.53 | 1 | 7385 | 8 | 2 |
| mrna | 0.3 | 0.1 | 5072 | 82 | 4 |
| vaccine | 1 | 0.5 | 3147 | 39 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| history of mrna vaccine | 0.02 | 0.8 | 6151 | 32 |
