| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| deadly virus outbreaks by year | 0.41 | 0.1 | 2273 | 18 |
| history of deadly virus outbreaks | 0.86 | 0.8 | 6989 | 47 |
| cdc warns of deadly virus outbreak | 0.03 | 0.6 | 8294 | 36 |
| most recent virus outbreak | 0.5 | 0.2 | 8741 | 79 |
| major virus outbreaks in world history | 1.4 | 0.8 | 209 | 81 |
| deadly viruses over the years | 1.54 | 0.6 | 5691 | 54 |
| current deadly disease outbreak | 1.69 | 0.1 | 4786 | 17 |
| deadly outbreak in us | 1.11 | 0.6 | 5981 | 4 |
| worst virus outbreak in history | 1.31 | 0.5 | 9673 | 45 |
| deadly virus in usa | 1.78 | 0.9 | 6728 | 7 |
| deadly virus in us | 0.63 | 0.4 | 6914 | 27 |
| cdc current virus outbreaks | 0.85 | 0.3 | 9221 | 61 |
| deadliest outbreaks in history | 0.83 | 0.7 | 7131 | 25 |
| deadliest disease outbreaks in history | 0.85 | 0.5 | 1068 | 17 |
| most deadly virus in history | 2 | 0.3 | 6575 | 4 |
| virus outbreaks in us history | 1.67 | 0.3 | 9639 | 70 |
| infectious outbreaks in the last decade | 1.1 | 0.3 | 7097 | 43 |
| what was the last virus outbreak | 0.22 | 0.7 | 1866 | 70 |
| deadly outbreak confirmed in us | 1.58 | 1 | 8748 | 55 |
| viruses in historical outbreaks | 0.56 | 0.8 | 3237 | 71 |
| what is the deadliest virus today | 1.29 | 0.4 | 9118 | 41 |
