Ключевые слова: abstract, app, area, art, background, bacteria, badge, banner, bio, biohazard, biological, black, button, caution, circle, concept, creative, danger, dangerous, design, epidemic, flat, geometric, graphic, hazard, icon, illustration, isolated, lab, label, mark, paper, protect, protection, quality, risk, science, seal, security, shadow, shape, sign, stamp, symbol, token, toxic, virus, white, zone,