Ye (2021) Changes in serum virus-specific IgM/IgG antibody in asymptomatic and discharged patients with reoccurring positive COVID-19 nucleic acid test (RPNAT),

Background It has been reported that antibody testing could improve diagnostic efficiency of COVID-19 infection. However the IgM/IgG changes in asymptomatic and discharged patients with reoccurring positive RT-PCR test (RP) remained elusive. Methods 111 patients with positive RT-PCR test and 40 suspected patients were enrolled. We evaluated the diagnostic performance of IgM/ IgG antibodies. Furthermore, the IgM/IgG levels with the disease progress in asymptomatic and RP patients were analyzed. Results Of the 111 RT-PCR positive cases, 17 (15.5%), 42(38.2%), 22 (20%) and 30(27.0%) were