Ключевые слова: adult, aid, air, care, city, coronavirus, covid 19, danger, dangerous, dirty, disaster, disease, environment, epidemic, facial, flu, gas mask, hazard, human, industry, infection, lifestyle, male, man, mask, medical, mouth, occupation, one, pandemic, people, pollution, prevention, production, protect, protection, protective, quarantine, researcher, respirator, responsibility, safety, scientist, situation, smog, smoke, street, toxic, urban, virus,