Mary's having trouble breathing.
D000293:Adolescent; D000402:Airway Obstruction / Q000209:etiology*; D001249:Asthma / Q000150:complications; D001990:Bronchiolitis, Viral / Q000150:complications; D002648:Child; D002675:Child, Preschool; D003440:Croup / Q000150:complications; D004825:Epiglottis; D005334:Fever / Q000209:etiology; D005547:Foreign Bodies / Q000150:complications; D006801:Humans; D006985:Hyperventilation / Q000150:complications; D007223:Infant; D007231:Infant, Newborn; D007819:Laryngeal Edema / Q000150:complications; D007827:Laryngitis / Q000150:complications; D007830:Larynx; D014132:Trachea