Ключевые слова: air, air conditioner, air cooling, air filters, apartment, care, cleaning service, contamination, control, diagnosis, digital, dirty, disease, dust, electric, electrical, epidemic, filter, flu, health, home, illness, infect, infected, infection, influenza, maintenance, medical, medicine, outbreak, pandemic, particles, particulate matters, pneumonia, pollution, problem solving, purifier, respiratory system, room, sars, science, service, syndrome, temperature, virus, wall,