Ключевые слова: activities, business, caucasian, city, communication, concept, contacting, coronavirus, couple, covered, crowd, crowded, destination, distance, epidemic, epidemiology, escalator, europa, europe, health, lifestyle, man, mask, metro, modern, motion, pandemic, passage, passenger, precaution, prevention, protection, quarantine, railway, respiratory, safety, social, station, subway, tourism, tourist, traffic, train, transit, transport, travel, underground, urban, virus, way,