1La Torre G, Nicolott IN, de Waure C, et al. An assessment of the effect of hepatitis B vaccine in decreasing the amount of hep- atitis B disease in Italy [J]. Virol J, 2008,5:84.
2Centers for Disease Control and Prevention. Epidemiology and prevention of vaccine-preventable diseases [ M]. Atlanta: Public Health Eoundation, 2004 : 195-196.
4Heijtink RA, Schneeberger PM, Pc,stma B, et al. Anti-HBs lev- els after hepatitis B immunisation depend on test reagents: rou- tinely determined 10 and 100 IU/L seroproteetion levels unreliable [J]. Vaccine, 2002,20(23 24) :2899-2905.