An upper respiratory tract may undergo an infection.Logical formLearned from14 sentences. Part may pertain-to a respiratory system.Logical formLearned from14 sentences. Risk can be for respiratory virus.Logical formLearned from14 sentences. Respiratory virus may be related.Logical formLearned from14 sentences. Services can be respiratory.Logical formLearned from14 sentences. (Therapy services) can be respiratory.Logical formLearned from14 sentences. A transmission can be respiratory.Logical formLearned from14 sentences. Rates can be constituted-of-or-filled-with respiratory illness.Logical formLearned from14 sentences. A (depressant effect) can be respiratory.Logical formLearned from14 sentences. A (syndrome crisis) can be respiratory.Logical formLearned from14 sentences. A machine can be respiratory.Logical formLearned from14 sentences. (Shoeshine boy) may die of respiratory failure.Logical formLearned from14 sentences. A respiratory system may undergo an infection.Logical formLearned from14 sentences. Afflictions can be respiratory.Logical formLearned from14 sentences. Tissues can be respiratory.Logical formLearned from14 sentences.