Ключевые слова: alert, area, background, bacteria, beware, bio, biohazard, biologic, biological, biology, black, caution, chemical, contagious, contamination, danger, dangerous, death, disease, environment, epidemic, forbidden, hazard, hazardous, icon, infection, infectious, lab, label, medical, poison, protect, protection, research, risk, safety, science, security, sign, substance, symbol, toxic, viral, virus, warn, waste, weapon, yellow, zone,