A virus may evolve into a form.Logical formLearned from31 sentences. Persons may have a virus.Logical formLearned from31 sentences. A (virus removal) may save a person a lot of time.Logical formLearned from31 sentences. A virus can be persistent.Logical formLearned from31 sentences. A computer may be attacked by a virus.Logical formLearned from31 sentences. A virus can be artificial.Logical formLearned from31 sentences. A virus may originated in a country.Logical formLearned from31 sentences. A virus may be transmitted by contact.Logical formLearned from31 sentences. Symptoms may pertain-to a virus.Logical formLearned from31 sentences. A virus can be harmless.Logical formLearned from31 sentences. A virus may undergo an injection.Logical formLearned from31 sentences. An incidence may pertain-to a virus.Logical formLearned from31 sentences. A virus can be difficult.Logical formLearned from31 sentences. A virus may come from a country.Logical formLearned from31 sentences. A virus may attack a central nervous system.Logical formLearned from31 sentences.