Fig. 5. Longitudinal observation of SARS-CoV-2 RT-PCR and IgG assays in COVID-19 cases with fluctuating RT-PCR results. Orange dots indicate IgG results and the dashed line shows the IgG assay cutoff value (index=1.40). Blue dots indicate RT-PCR results (positive and negative).
Abbreviations: SARS-CoV-2, severe acute respiratory syndrome coronavirus 2; COVID-19, Coronavirus disease 2019; RT-PCR, reverse transcription-polymerase chain reaction.

Ann Lab Med 2021;41:568~576 https://doi.org/10.3343/alm.2021.41.6.568