Hub proteins for post-COVID-19 individuals included cytastatin 3 (CST3), Notch homolog 1, translocation-associated (NOTCH1), complement factor H-related 5 (CFHR5), and ST6 beta-galactoside alpha-2,6-sialyltransferase 1 (ST6GAL1). Here, CFHR5 is linked to COVID-19.