Ключевые слова: adult, air, car, chemical, city, cityscape, contamination, cough, danger, disease, dust, environment, environmental, epidemic, europe, face, female, filter, flu, fog, girl, health, ill, influenza, mask, medical, outdoor, people, poland, polluted, pollution, prevention, protect, protection, protective, road, safety, sick, smog, smoke, street, toxic, traffic, transport, unhealthy, urban, virus, wearing, woman, young,