Some children can be with a virus.Logical formLearned from13 sentences. A (bird flu virus) may mutate into a strain.Logical formLearned from13 sentences. A virus may invade a nervous system.Logical formLearned from13 sentences. Warnings can be about a virus.Logical formLearned from13 sentences. A virus may start.Logical formLearned from13 sentences. A (bird flu virus) may be found in poultry.Logical formLearned from13 sentences. A (bird flu virus) may sweep a continent.Logical formLearned from13 sentences. Tests may find a virus.Logical formLearned from13 sentences. A virus may cause a disease.Logical formLearned from13 sentences. Risks may pertain-to a virus.Logical formLearned from13 sentences. A reservoir can be constituted-of-or-filled-with viruses.Logical formLearned from13 sentences. Droplets may contain a virus.Logical formLearned from13 sentences. A virus can be responsible for a disease.Logical formLearned from13 sentences. Rats may pick_up a virus on bodies.Logical formLearned from13 sentences. A virus may be knowned as enterovirus.Logical formLearned from13 sentences.