Attributed to widespread use of hepatitis B vaccine
and other strategies for control of HBV infection, the
prevalence of HBsAg carrier rate in general population
in China decreased from some 10.0% in 1980 s to 7.2%
in 2006 [10-12]. However, HBV infection is still endemic
in China. Studies have shown that the prevalence of
occult HBV infection is closely related to the endemicity
of HBV infection [13,14], however, the occult HBV
infection in China has been less studied [15-17]. Thus,
we performed this study to investigate the prevalence of
occult HBV infection in blood donors in Nanjing, an
eastern region of China.