Ключевые слова: adult, air, asthma, background, bacteria, building, care, ceiling, chest, cleaning, cold, conditioner, conditioning, copd, cough, dirty, disease, duct, dust, health, heating, home, house, human, illness, illustration, infection, interior, lung, maintenance, male, man, medical, medicine, metal, office, pneumonia, pneumoniae, respiratory, sick, streptococcus, technology, tuberculosis, vent, ventilation, wall,