Ключевые слова: agent, alert, bacteria, bio, biohazard, biologic, biological, biology, caution, chemical, danger, dangerous, environment, epidemic, experiment, flat, forbidden, hazard, hazardous, icon, illustration, isolated, lab, laboratory, medical, protect, protection, research, restricted, risk, safety, science, security, sign, signal, symbol, toxic, virus, warfare, warn, warning, waste, weapon, white,