| influenza virus | 60 |
| zika virus | 48 |
| new virus | 21 |
| respiratory virus | 7 |
| rna virus | 7 |
| known virus | 4 |
| macro virus | 4 |
| trojan virus | 1 |
| infect bacteria | 0.67 |
| enter cell | 0.64 |
| cause disease | 0.62 |
| enter the body | 0.61 |
| cause chickenpox | 0.60 |
| live outside the body | 0.60 |
| damage datum | 0.59 |
| infect human | 0.59 |
| use protein | 0.59 |
| act like the service | 0.58 |
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| flu | 0.63 |
| cold | 0.62 |
| common cold | 0.59 |
| cold sores | 0.56 |
| bronchitis | 0.55 |
| symptom | 0.54 |
| infection | 0.53 |
| aids | 0.53 |
| influenza | 0.52 |
| vomiting | 0.52 |
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| genetic material | 0.60 |
| gene | 0.59 |
| rna | 0.56 |
| either dna | 0.56 |
| dna | 0.53 |
| impact | 0.51 |
| genome | 0.48 |
| envelope | 0.48 |
| wide host range | 0.45 |
| enzyme | 0.41 |
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| host | 0.40 |
| a host cell | 0.39 |
| extra steps | 0.36 |
| liver failure | 0.32 |
| chronic infection | 0.28 |
| program | 0.60 |
| obligate intracellular … | 0.54 |
| parasite | 0.51 |
| small infectious agent | 0.46 |
| small program | 0.39 |
| causative agent | 0.38 |
| intracellular parasites | 0.36 |
| microscopic organisms | 0.34 |
| infectious agent | 0.34 |
| self-replicating program | 0.33 |
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| removed | 0.67 |
| spread | 0.65 |
| identified | 0.65 |
| transmitted by mosquito | 0.62 |
| transmitted | 0.61 |
| tested | 0.61 |
| transmitted to human | 0.61 |
| developed | 0.60 |
| detected | 0.60 |
| obtained | 0.58 |
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