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Comparison of serum or plasma nucleocapsid levels by (A–C) severity and (D and E) inflammatory biomarkers. B and C, Intubation includes intubation within 30 days before or after the blood sample was collected. D and E, Individuals with severe COVID-19 as defined by the composite of 30-day intubation or mortality are highlighted. Abbreviations: COVID-19, coronavirus disease 2019; CRP, C-reactive protein; FEU, fibrinogen equivalent unit.
