Ключевые слова: air, asia, asian, boy, care, child, city, clinic, concept, coronavirus, cure, danger, dangerous, decease, dirt, docto, doctor, dust, ebola, environment, environmental, face, filter, flu, fumes, green, growth, harmful, haze, heal, health, hospital, infection, kid, mask, medical, mouth, pollute, pollution, population, protect, protection, safety, smog, street, unhealthy, urban, virus, wearing, young,