A virus may survive.Logical formLearned from53 sentences. A virus may spread to a country.Logical formLearned from53 sentences. A virus may spread around the world.Logical formLearned from53 sentences. Viruses may be detected.Logical formLearned from52 sentences. (Virus signatures) can be up-to-date.Logical formLearned from52 sentences. Complications can be from a virus.Logical formLearned from52 sentences. Changes can be in a virus.Logical formLearned from52 sentences. A virus may infect cells.Logical formLearned from52 sentences. A nation may be worst-hited by a virus.Logical formLearned from52 sentences. A growth may pertain-to a virus.Logical formLearned from51 sentences. Viruses can be transmitted.Logical formLearned from51 sentences. A virus may cause symptoms.Logical formLearned from51 sentences. Viruses can be seasonal.Logical formLearned from51 sentences. Fears can be over a virus.Logical formLearned from51 sentences. A virus may undergo a circulation.Logical formLearned from50 sentences.