Ключевые слова: alert, area, attention, beware, bio, biohazard, biological, biology, caution, chemical, contagious, contaminated, contamination, danger, dangerous, deadly, element, emergency, environment, epidemic, forbidden, hazard, hazardous, illustration, infection, isolated, label, logo, medical, notice, pollution, prohibition, protect, protection, radiation, red, research, restricted, restriction, risk, science, scientific, security, sign, symbol, toxic, warn, zone,