Ключевые слова: biologist, career, caucasian, chemist, chemistry, clinic, doctor, equipment, expert, expertise, flu, glasses, health, indoor, industrial, infection, job, lab, laboratory, liquid, looking, male, man, mask, medical, medicine, nurse, occupation, people, person, portrait, practitioner, professional, protection, protective, research, safety, science, scientist, specialist, standing, suit, surgical, technician, technologist, technology, test, virus, white, working,