But since his biopsy showed tubular injury (usually seen with COVID-19 infection), tubuloreticular inclusion bodies (indicating high interferon activity seen with viral infections), several C3 deposits (seen due to complement activation in COVID-19 infection) and active COVID-19 infection, the patient’s condition was diagnosed as active COVID-19 infection-induced glomerulonephritis rather than C3GN. The gene discussed is C3; the disease is glomerulonephritis.