Ключевые слова: attention, bacteria, biohazard, biologic, biological, biology, biosecurity, caution, chemical, contagious, contamination, danger, dangerous, environment, epidemic, forbidden, hazard, hazardous, icon, infection, infectious, isolated, lab, man, mask, poison, pollution, protect, protection, red, research, respirator, restricted, risk, safety, science, scientific, security, sign, signal, substance, symbol, toxic, virus, warn, waste, white, yellow, zone,