KRT88P and hepatitis B virus infection: Another report analyzing 28,016 blood donors during 2014–2017 showed an average prevalence of 1.05% for anti-HBc positivity; it also pointed out low educational background and age over 50 years old as the main risk factors; additionally, nine cases of occult hepatitis B infections (OBIs) were identified among the anti-HBc-positive donors [40].