Ключевые слова: adult, air, background, bacteria, building, ceiling, chest, clean, cleaning, cold, conditioner, conditioning, cooler, copd, cough, dirty, disease, duct, dust, flow, health, heating, hole, home, house, human, humid, illness, interior, lung, maintenance, medical, medicine, metal, modern, new, office, pain, part, pneumonia, pneumoniae, respiratory, sick, streptococcus, sucking, tuberculosis, vent, ventilation, wall, white,