| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| polio mortality rate before vaccine | 0.67 | 0.6 | 4056 | 36 |
| polio rates before and after vaccine | 0.27 | 0.8 | 2415 | 40 |
| polio vaccine effective rate | 0.16 | 0.5 | 6992 | 60 |
| polio virus mortality rate | 0.19 | 0.9 | 4843 | 5 |
| mortality rate of polio | 1.93 | 0.8 | 8162 | 36 |
| graph of polio before and after vaccine | 1.67 | 0.1 | 3665 | 53 |
| how effective is the polio vaccine | 1.24 | 0.9 | 9142 | 72 |
| polio vaccine efficacy rates | 0.16 | 0.3 | 5366 | 78 |
| effectiveness of the polio vaccine | 0.37 | 1 | 4692 | 41 |
| efficacy of the polio vaccine | 0.95 | 0.4 | 9428 | 40 |
| polio case fatality rate | 1.71 | 0.8 | 2494 | 63 |
| death rate of polio virus | 0.06 | 1 | 6166 | 66 |
| fatality rate of polio | 0.55 | 0.6 | 811 | 3 |
| death rate from polio | 1.47 | 0.6 | 2128 | 36 |
| how effective was the polio vaccination | 0.27 | 0.3 | 2532 | 63 |
