This cross-sectional study included 1385 paired plasma and DBS samples (71 HBsAg positive, 185 anti-HBc positive, 108 anti-HCV positive, 298 HBsAg negative, 357 anti-HBc negative, 366 anti-HCV negative) collected at the Viral Hepatitis Clinic (FIOCRUZ, RIO DE JANEIRO, BRAZIL). Here, KRT88P is linked to viral hepatitis.