Ключевые слова: 15, 2019ncov, alert, attention, caution, control, coronavirus, covid19, disease, distance, distancing, distant, europe, gathering, guide, health, infection, infectious disease, instruction, limitation, line, lines, lock down, marked, marking, message, meter, metre, netherlands, outbreak, outdoors, pandemic, prevention, preventive, protection, public, quarantine, reminder, road, safe, safety, sidewalk, sign, social distancing, spread, street, transmission, virus, warning, yellow,