Ключевые слова: adult, attention, biohazard, biologic, biological, biology, caution, chemical, chemistry, concept, copy space, danger, dangerous, dead, dust, ecological, ecology, epidemic, equipment, face, gas, gasmask, green, hazard, industrial, industry, laboratory, male, man, mask, pandemic, person, portrait, profile, protection, protective, protective mask, protective suit, radiation, radioactivity, researching, respirator, safety, scientist, sign, suit, toxic, uniform, virus, warning,