| cause illness | 0.39 |
| infect other cells | 0.37 |
| infect people | 0.26 |
| attack wild and farmed … | 0.25 |
| jump to human | 0.17 |
| share severe acute resp… | 0.16 |
| go into cells of differ… | 0.16 |
| kill the cell | 0.16 |
| a mix of genes | 0.25 |
| dangerous | 0.20 |
| transmissible | 0.16 |
| created | 0.69 |
| discovered | 0.55 |
| introduced | 0.40 |
| related | 0.29 |
| transmitted to person | 0.28 |
| launched | 0.25 |
| isolated | 0.25 |
| recognized | 0.25 |
| detected in april | 0.16 |
| spread to many countries | 0.16 |