Ключевые слова: alert, attention, backgrounds, barrier, biohazard, caution, city, close up, closed, coronavirus, covid19, danger, emergency, epidemic, hand, health, holding, home, human, infection, information, inscription, isolated, mask, medical, medicine, no entry, no people, oreforms, pandemic, person, placard, police tape, problems, professional union, protection, quarantine, respirator, separate, sign, stay, stay home, stop, symbol, tape, vaccine, virus, warning, yellow, zone,