Ключевые слова: alert, area, attention, bacteria, beware, bio, biohazard, biohazard symbol, biologic, biological, biology, black, caution, chemical, contamination, danger, dangerous, epidemic, forbidden, hazard, hazardous, icon, illustration, infectious, isolated, lab, laboratory, medical, poison, protect, protection, research, restricted, risk, safety, science, security, sign, signal, substance, symbol, toxic, virus, warn, warning, waste, weapon, yellow, zone,