Ключевые слова: adult, air, antismog, breath, care, city, danger, dangerous, dirty, disaster, environment, epidemic, facial, flu, gas mask, gasmask, hazard, health, human, industry, infection, lifestyle, male, man, mask, medical, occupation, one, pandemic, people, pollution, prevention, production, protect, protection, protective, quarantine, respirator, responsibility, safety, smog, smoke, street, toxic, urban, virology, virus, wearing,