| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| polio vaccines 1950s statistics | 0.68 | 0.8 | 1483 | 8 | 31 |
| polio | 1.14 | 0.1 | 891 | 16 | 5 |
| vaccines | 0.84 | 0.5 | 3321 | 43 | 8 |
| 1950s | 0.58 | 0.5 | 5566 | 44 | 5 |
| statistics | 1.64 | 0.1 | 8763 | 1 | 10 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| polio vaccines 1950s statistics | 1.27 | 0.4 | 974 | 44 |
| polio vaccines 1950s impact | 0.32 | 0.9 | 6796 | 85 |
| polio vaccines 1950s timeline | 1.79 | 1 | 7912 | 72 |
| polio vaccines 1950s development | 1.1 | 0.7 | 3908 | 72 |
| polio vaccines 1950s trials | 1.86 | 1 | 6676 | 73 |
| polio vaccines in the 1960s | 1.1 | 0.5 | 9765 | 73 |
| polio vaccines 1950s inventor | 1.91 | 0.6 | 6919 | 47 |
| polio epidemic 1950s us | 0.12 | 0.4 | 389 | 55 |
| how common was polio before the vaccine | 0.07 | 1 | 9913 | 68 |
| polio in the 1950s | 0.48 | 0.9 | 2583 | 22 |
| polio history in the 1950s | 1.2 | 0.1 | 1858 | 59 |
| polio vaccine history 1955 | 0.84 | 0.4 | 1422 | 13 |
| polio vaccine history in usa | 1.74 | 1 | 8173 | 93 |
| polio vaccine in 1954 | 1.48 | 0.6 | 9123 | 50 |
| us polio vaccination history | 1.01 | 0.7 | 5780 | 95 |
| history of polio vaccination in usa | 1.36 | 0.8 | 8667 | 64 |
| polio mortality rate 1950 | 1.82 | 1 | 1946 | 57 |
| polio deaths in 1950 | 0.8 | 0.9 | 6048 | 92 |
