| cause disease | 0.62 |
| infect human | 0.40 |
| killed sierra leone | 0.37 |
| affect human | 0.35 |
| killed liberia | 0.34 |
| spread to liberia | 0.34 |
| kill thousand | 0.34 |
| ravage west africa | 0.32 |
| infect cell | 0.30 |
| belong to the filovirid… | 0.30 |
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| hemorrhagic fever | 0.42 |
| vomiting | 0.29 |
| diarrhea | 0.22 |
| vaccine | 0.29 |
| approved therapy | 0.16 |
| contagious | 0.69 |
| dangerous | 0.52 |
| fatal | 0.48 |
| airborne | 0.34 |
| sensitive | 0.25 |
| discovered in 1976 | 0.68 |
| transmitted to human | 0.63 |
| transmitted by direct c… | 0.47 |
| discovered | 0.26 |
| detected in duiker | 0.25 |
| comprised of five disti… | 0.25 |
| discovered in the democ… | 0.16 |
| contained | 0.16 |
| destroyed | 0.16 |
| reported in liberia | 0.16 |
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