A virus may die_out.Logical formLearned from14 sentences. A virus may undergo an invasion.Logical formLearned from14 sentences. A virus can be in 1980s.Logical formLearned from14 sentences. A virus may cause deaths.Logical formLearned from14 sentences. A virus may mutate into a (deadlier form).Logical formLearned from14 sentences. Viruses may reassort with genetic material.Logical formLearned from14 sentences. Others may have a virus.Logical formLearned from14 sentences. A virus may be spreaded through transmission.Logical formLearned from14 sentences. A bug may contain virus.Logical formLearned from14 sentences. A (flu virus) can be virulent.Logical formLearned from14 sentences. A virus can be entrenched.Logical formLearned from14 sentences. Primates may carry a virus.Logical formLearned from14 sentences. A virus may cause illness.Logical formLearned from14 sentences. Images may pertain-to a virus.Logical formLearned from14 sentences. A name may pertain-to a virus.Logical formLearned from14 sentences.