Some persons may be tested for a virus.Logical formLearned from14 sentences. A spread of a virus may slow.Logical formLearned from14 sentences. A virus may cause an (influenza pandemic).Logical formLearned from14 sentences. Resistance may pertain-to a virus.Logical formLearned from14 sentences. Canning may deactivate a virus.Logical formLearned from14 sentences. A virus may affect a nervous system.Logical formLearned from14 sentences. A shape may pertain-to a virus.Logical formLearned from14 sentences. Concern can be over a virus.Logical formLearned from14 sentences. A fight can be against a virus.Logical formLearned from14 sentences. Migratory birds may spread a virus.Logical formLearned from14 sentences. A (polio virus) may reemerge in a country.Logical formLearned from14 sentences. A virus may mutate into a killer.Logical formLearned from14 sentences. A (flu virus) may undergo a mutation.Logical formLearned from14 sentences. A male may spread a virus.Logical formLearned from14 sentences. A conference can be on a virus.Logical formLearned from14 sentences.