Ключевые слова: agent, background, bacteria, bio, biohazard, biologic, biological, biology, black, caution, chemical, danger, dangerous, environment, epidemic, experiment, forbidden, hazard, icon, illustration, infectious, isolated, lab, laboratory, logo, medical, original, protection, research, restricted, safety, science, scientific, security, sign, signal, silhouette, simple, single, symbol, toxic, virus, warfare, warn, warning, waste, weapon, white,