Ключевые слова: air, barrier, breathing, busy, casual, city, communication, concept, contemporary, coronavirus, covid19, crisis, danger, descent, distance, epidemic, flu, girl, guy, hand, health, infection, life, lifestyle, looking, man, mask, metro, modern, pandemic, passenger, people, person, problem, protection, quarantine, rule, rush, safety, serious, standing, station, subway, underground station, urban, virus, waiting, wearing, woman, young,