A (computer virus) may be snarled.Logical formLearned from17 sentences. A virus can be in a month.Logical formLearned from17 sentences. A virus may be reported in a country.Logical formLearned from17 sentences. Someone may show symptoms of a virus.Logical formLearned from17 sentences. A virus may spread to some states.Logical formLearned from17 sentences. Some persons may be killed by a virus.Logical formLearned from17 sentences. A virus may spread to a continent.Logical formLearned from17 sentences. Knowledge may pertain-to a virus.Logical formLearned from17 sentences. A virus may stop.Logical formLearned from17 sentences. An avian-flu virus may undergo a mutation.Logical formLearned from17 sentences. A virus can be resistant to drugs.Logical formLearned from17 sentences. A virus may mutate into a (form transmissible).Logical formLearned from17 sentences. A virus may be found in some swans.Logical formLearned from17 sentences. Tests may confirm a virus.Logical formLearned from17 sentences. A (bird flu virus) may undergo a discovery.Logical formLearned from17 sentences.