Ключевые слова: 2019ncov, barrier, building, city, concept, contamination, coronavirus, covid19, danger, disease, down, emergency, epidemic, flu, global, infect, infection, influenza, lock, lockdown, modern, national, nationwide, outbreak, pandemic, panic, prevention, protection, public, quarantine, red, risk, safety, sars, sign, sky, stop, urban, virus, warning, world, zone,