Figure 1.

SARS-CoV-2 antigen levels versus time. The concentration of S1 (A), spike (B), and N (C) measured in the plasma of individuals over time after diagnosis with PASC or COVID-19 following SARS-CoV-2 infection. Multiple data points may correspond to the same individual, where repeat sampling was available. Data points represent mean values ± SD (n = 2). Dashed lines indicate the LOD for each assay. Abbreviations: COVID-19, coronavirus disease; LOD, limit of detection; PASC, postacute sequelae of coronavirus disease 2019; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.