The biopsy revealed fibrinoid necrosis, crescentic glomerulonephritis, several RBC casts (in distal tubules), tubuloreticular inclusions in endothelial cells and C3 deposits supporting the diagnosis of infection-related glomerulonephritis (Figure 1 and Figure 2—biopsy images) from active COVID-19 infections. Here, C3 is linked to glomerulonephritis.