| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| mrna vaccine history timeline | 0.61 | 0.4 | 1624 | 58 | 29 |
| mrna | 1.02 | 0.3 | 5476 | 85 | 4 |
| vaccine | 0.62 | 0.3 | 8482 | 68 | 7 |
| history | 1.88 | 1 | 6096 | 70 | 7 |
| timeline | 0.19 | 0.6 | 9161 | 64 | 8 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| mrna vaccine history timeline | 1.17 | 0.8 | 315 | 26 |
| mrna vaccine development history | 0.01 | 0.3 | 1599 | 28 |
| what is mrna vaccine history | 1.22 | 0.9 | 4735 | 79 |
| history of mrna vaccines development | 1.5 | 0.6 | 4575 | 9 |
| when did mrna vaccine research begin | 1.77 | 0.7 | 930 | 30 |
| when did mrna vaccine research start | 0.85 | 0.8 | 6106 | 11 |
| when was the mrna vaccine first used | 0.13 | 0.7 | 6578 | 37 |
| history of mrna vaccines and their future | 1.54 | 0.7 | 7155 | 5 |
| when was the mrna vaccine developed | 1.64 | 0.2 | 170 | 82 |
| history of mrna vaccines and their safety | 1.5 | 0.3 | 7972 | 26 |
| history of mrna vaccines and their mechanism | 1.29 | 0.4 | 4135 | 57 |
| when mrna vaccine was created | 1.19 | 0.7 | 8467 | 35 |
| when were mrna vaccines discovered | 0.74 | 0.3 | 1256 | 84 |
| when were mrna vaccines first invented | 0.81 | 0.6 | 4130 | 90 |
