Ключевые слова: air, allergy, asia, asian, bad, black, cancer, care, city, dangerous, disease, dust, environment, face, female, filter, fog, gas, global, hazard, health, human, infection, influenza, mask, medical, people, pollution, polyurethane, problem, protect, protection, quality, safety, sick, smog, smoke, thailand, toxic, unhealthy, urban, virus, warming, weather,