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Increased levels of C3a and C5b-9 in COVID-19 patients differentially predict ICU admission, intubation and mortality. Receiver operating characteristic curves for prediction of need for intensive care treatment (a) intubation (b) and survival (c). (d) Corresponding area under the curve (AUC), p values, and optimal cut-off points with combined greatest sensitivity (%) and specificity (%) and odds ratio values are shown.
