Ключевые слова: background, blue, care, chemical, chemist, chemistry, clinic, clinical, closeup, contaminated, danger, doctor, equipment, glove, hand, happy, hazard, hazardous, hazmat, health, hospital, indoor, industry, isolated, laboratory, man, mask, medic, medical, medicine, operation, person, pollution, practitioner, preparation, professional, protection, protective, radioactive, radioactivity, researcher, safety, science, sterile, suit, surgeon, uniform, work, worker,