Figure 2.

Clinical status, PCR results and serological responses in a patient with prolonged COVID-19. Time course of clinical status, PCR results and serological values. (A) Oxygen supplementation and saturation level during the admission periods. (B) PCR results of nasopharyngeal swabs and one sputum sample (Ct value means cycle threshold: a high value indicates a low amount or viral RNA and vice versa). The cut-off is indicated with an interrupted line. (C) Results of serological assays. Anti-NC was measured repeatedly during admission. The anti-S antibodies were measured only retrospectively. The cut-off values for both assays and the three time points of administration of convalescent plasma are indicated. The results of the T cell assays are shown in Figure 3 and Supplementary Figures S3 and S4.