| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| most lethal virus in history | 1.72 | 0.6 | 7999 | 73 |
| the most lethal virus in human history | 1.43 | 0.5 | 8234 | 24 |
| the most deadly virus in history | 0.51 | 0.2 | 3762 | 29 |
| the most deadliest virus in history | 0.93 | 0.6 | 8824 | 19 |
| most deadly virus in human history | 0.35 | 0.7 | 6037 | 80 |
| deadliest virus in human history | 1.97 | 0.6 | 9661 | 22 |
| most dangerous virus in history | 0.02 | 0.1 | 2015 | 42 |
| what is the most lethal virus | 1.91 | 0.7 | 8314 | 21 |
| what was the most deadly virus | 0.78 | 0.7 | 2168 | 74 |
| which virus was the deadliest | 0.22 | 0.3 | 5066 | 61 |
| what was the deadliest virus | 0.31 | 0.3 | 2526 | 67 |
| deadliest virus of all time | 0.44 | 0.5 | 4053 | 20 |
| deadliest virus in the world | 1.19 | 1 | 5275 | 88 |
