Ключевые слова: bacteria, bio, biohazard, biologic, biological, biology, black, caution, chemical, chemistry, contaminated, danger, dangerous, education, epidemic, experiment, flu, forbidden, hazard, icon, illustration, lab, laboratory, medical, medicine, notice, organic, organism, pollution, protect, protection, research, restricted, risk, safety, science, scientific, security, sign, signal, substance, symbol, toxic, triangle, triangular, virus, warn, waste, yellow,