| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| the 2009 h1n1 flu virus | 0.47 | 0.8 | 8676 | 42 |
| the 2009 h1n1 flu virus quizlet | 1.01 | 1 | 7481 | 9 |
| h1n1 bird flu 2009 | 1.81 | 0.1 | 3233 | 96 |
| h1n1 swine flu outbreak in 2009 | 1.5 | 0.7 | 3652 | 98 |
| influenza a h1 2009 vs h1n1 | 1.91 | 0.7 | 8207 | 65 |
| influenza virus a h1 2009 pandemic | 0.57 | 0.2 | 4966 | 2 |
| h1n1 swine flu 2009 | 1.98 | 0.1 | 1291 | 13 |
| influenza a 2009 h1 | 1.35 | 0.7 | 3133 | 37 |
| influenza virus a h1 2009 pandemic rna | 1.09 | 0.2 | 5878 | 9 |
| cdc influenza h1n1 2009 deaths | 1.22 | 0.3 | 3025 | 42 |
| influenza a virus subtype h1 2009 | 1.21 | 0.6 | 9830 | 59 |
| novel influenza h1n1 09 | 1.77 | 1 | 7539 | 51 |
| h1n1 influenza a virus | 1.54 | 0.2 | 5529 | 51 |
| h1n1 vaccine in 2009 | 1.05 | 0.5 | 4805 | 66 |
| h1n1 swine flu pandemic | 1.33 | 0.1 | 6487 | 16 |
| novel influenza h1n1-09 vaccine | 1.29 | 0.6 | 3802 | 61 |
| influenza a subtype h1-2009 | 0.28 | 0.7 | 2589 | 55 |
