A virus may spread to some provinces.Logical formLearned from16 sentences. A virus may be spreaded through food.Logical formLearned from16 sentences. A virus can be difficult.Logical formLearned from16 sentences. A virus may be unleashed.Logical formLearned from16 sentences. (Virus stocks) may undergo destruction.Logical formLearned from16 sentences. A population may be infected with a virus.Logical formLearned from16 sentences. A virus can be strong.Logical formLearned from16 sentences. A transmission may pertain-to a virus.Logical formLearned from16 sentences. A virus may reside between outbreaks.Logical formLearned from16 sentences. Rates may pertain-to a virus.Logical formLearned from16 sentences. A virus may cause hundreds of thousands of (computer meltdowns).Logical formLearned from16 sentences. A virus may be diagnosed.Logical formLearned from16 sentences. A disease can be a virus.Logical formLearned from16 sentences. A virus may spread to a world-city.Logical formLearned from16 sentences. Viruses can be crippled.Logical formLearned from16 sentences.