Ключевые слова: air, allergy, asthma, asthmatic, background, breath, breathe, breathing, bronchial, bronchitis, care, child, control, doctor, empty, equipment, exhale, expiratory, flow, function, health, healthy, human, ill, illness, inhale, inhaler, inhaling, isolated, lung, measurement, medical, medicine, meter, observation, oxygen, peak, place, plastic, prescription, protect, pulmonary, rate, respiratory, scale, spirometry, steroids, system, test, treatment,