Ключевые слова: 40s, african american, analysing, black, caucasian, close up, cure, dna, face covering, face mask, female, focus on foreground, forties, front view, health, holding, horizontal, lab, laboratory, lateral flow, lft, medical, medicine, mixed race, occupation, one person, pandemic, pcr, people, person, ppe, researching, safety glasses, sample, science, scientist, studying, swab, test, testing, vaccine, variant, woman, women, worker, working,