Ключевые слова: adult, air, allergy, apartment, apnea, asthma, asthmatic, breath, breathing, bronchitis, care, caucasian, close up, disease, emergency, equipment, face, fibrosis, flu, health, healthcare, home, hospital, illness, indoors, inhaling, lung, lying, man, mask, medical, medical equipment, medicine, nasal, oxygen, oxygen equipment, oxygen mask, prevention, protection, pulmonary, respiration, respiratory, sick, sickness, sleep, sofa, therapy, throat, treatment, unhealthy,