| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| salk vaccine 1954 | 1.86 | 0.8 | 4865 | 44 | 17 |
| salk | 1.73 | 0.6 | 2227 | 5 | 4 |
| vaccine | 1.16 | 0.9 | 1615 | 33 | 7 |
| 1954 | 1.86 | 0.6 | 4547 | 16 | 4 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| salk vaccine 1954 | 0.66 | 1 | 6048 | 28 |
| in 1954 jonas salk developed a vaccine | 2 | 0.1 | 4574 | 10 |
| 1954 salk polio vaccine field trials | 1.28 | 0.9 | 5285 | 35 |
| how did jonas salk create the vaccine | 1.54 | 0.2 | 9098 | 49 |
| how did jonas salk make the vaccine | 1.08 | 0.2 | 2641 | 57 |
| history of the salk vaccine | 1.41 | 0.8 | 1724 | 25 |
| when was salk vaccine introduced | 1.51 | 0.6 | 17 | 93 |
| when did salk invent vaccine | 0.85 | 0.9 | 1165 | 24 |
| jonas salk develops the first polio vaccine | 0.71 | 1 | 5426 | 86 |
| jonas salk invented polio vaccine | 1.72 | 0.8 | 7192 | 29 |
| when did the salk vaccine come out | 1.77 | 0.2 | 3573 | 85 |
| jonas salk patent polio vaccine | 0.43 | 0.3 | 9495 | 24 |
| salk and pasteur developed the polio vaccine | 1.11 | 0.2 | 7126 | 87 |
| salk polio vaccine history | 1 | 0.6 | 197 | 81 |
| jonas salk polio vaccine | 1.78 | 0.7 | 6065 | 29 |
| how long was salk vaccine tested | 1.32 | 0.8 | 9932 | 42 |
| when was the salk polio vaccine developed | 1.56 | 1 | 444 | 62 |
| how was the salk vaccine administered | 1.06 | 0.8 | 9635 | 38 |
| is the salk vaccine used today | 0.6 | 0.2 | 8834 | 62 |
| john cusack vaccine movie | 0.73 | 0.8 | 4343 | 19 |
