Ключевые слова: apprentice, beautiful, blue background, caucasian, chemist, chemistry, clinic, close up view, comparison, completed work, coronavirus, dark hair, double effect, elegance, eureka, fingers, fluid, glass, glass vial, hand, heal, help, holds in his hand safety glasses, illness, infectious disease, intern, invention, isolated, laboratory, laboratory worker, medicine, microbiology, pharmaceutical, prophylaxis, reagent, research, safety, science, scientist, straight hair, style, substance, successful experiment, technology, uniform, vaccine, vial, virus, work clothes, young,