Ключевые слова: adult, analysis, background, bacteria, biochemistry, biology, biotechnology, bud, chemical, chemistry, clinic, clinical, closeup, cotton, covid, development, discovery, doctor, examination, female, gloves, grey, hands, health, industry, instrument, lab, laboratory, light, mask, medic, medical, microbiology, person, pharmacology, research, sample, science, scientist, swab, test, testing, tube, uniform, virus, woman, worker, young,