Ключевые слова: adults, air, allergic, allergy, assistance, asthma, asthmatic, breathe, breathing, bronchial, bronchitis, care, children, cold, comfortable, covid19, disease, dose, drops, efficiency, equipment, flu, health, healthy, help, horizontal, hospital, illness, inhalation, inhaler, mask, medical, medication, medicine, membrane, mesh, mouthpiece, nebulizer, pandemic, pneumonia, pulmonary, respiratory, small, smoke, spray, steam, therapy, trachea, treatment, ultrasonic,