Ключевые слова: 2, 19, 2019, alpha, analyze, analyzing, antibody, antigen, atk, beta, blood, cov, delta, detectable, detected, exam, kit, lab, laboratory, medical, molecular, nasal, nasopharyngeal, ncov, negative, not, omicron, pcr, plus, positive, rapid, report, result, rt, rtpcr, sample, sars, sarscov2, swab, test, testing, throat, undetectable, undetected, vaccination, vaccine, variant,