Ключевые слова: abstract, advice, aged, attention, background, banner, biohazard, border, care, caution, celebration, communication, concept, corona, coronavirus, country, covid, danger, disease, entry, epidemic, flag, flu, freedom, grunge, health, illness, infected, infection, medical, medicine, nation, outbreak, passed, pneumonia, poster, prevention, protection, quarantine, safety, spread, symbol, vintage, viral, virus, wall, warning, wood, wooden,