Occult hepatitis B (anti-HBc and HBV DNA positive, and HBsAg negative) was rare, as seen in Figure 4A, while anti-HBc negative HBV infection was even rarer, with 49 samples being HBsAg and HBV DNA positive and 9 being both anti-HBc and HBsAg negative but HBV DNA positive. This evidence concerns the gene KRT88P and hepatitis B virus infection.