Patients with COVID- 19 testing positive for nucleic acids of SARS-CoV -2 in re-examination after discharge from hospital: an analysis of three cases

ABSTRACT

Detection of the nucleic acids (NAs) of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the "gold standard" for diagnosis of coronavirus disease 2019 (COVID-19). Antibody detection in serum is an important auxiliary method. We undertook retrospective analyses of the results of NA detection and antibody detection in the diagnosis, treatment and isolation of COVID-19 patients at the beginning of the disease as well as upon discharge from hospital. We offered a preliminary discussion on the correlation between NA detection and antibody detection and the infectious factors of COVID-19. Our study can provide a reference for monitoring SARS -CoV-2 infection in the treatment and rehabilitation of patients with COVID-19.