Ключевые слова: arrow, circulation, city, concept, contagious, corona virus, coronavirus, covid19, danger, direction, distance, epidemic, feet, floor, hall, health, information, isolation, line, lockdown, message, one meter, outdoor, pandemic, pavement, people, person, prevention, protection, public, quarantine, risk, safe, safety, shoes, sign, social, social distancing, stay, store, symbol, traffic, urban, view, virus, waiting room, warning, way,