Fig. 1

Autoimmune assessment of post-COVID syndrome. A Positivity of autoantibodies in patients with PCS. Antibodies were considered “positive” if NFI was > 2 SD above the average NFI for pre-pandemic controls for that antigen. B Positivity for antibodies against coronaviruses, influenza, Epstein-Barr, cytomegalovirus, and the respiratory syncytial virus. C Correlation matrix between IgG anti-SARS-CoV-2 antibodies and the rest of IgG autoantibodies included in the microarray. Blue color represents negative correlation, whereas red color represents positive correlation. Only those significant correlations by spearman tests are colored (i.e., P < 0.0500). D Correlation matrix between age, sex, and the IgG autoantibodies. Blue color represents negative correlation, whereas red color represents positive correlation. Only those significant correlations by spearman tests are colored (i.e., P < 0.0500). NFI: normalized fluorescence intensity