Fig. 1From: Prevalence of hepatitis B surface antigen (HBsAg) in a blood donor population born prior to and after implementation of universal HBV vaccination in Shenzhen, ChinaFlow chart of blood donor testing. The first part of the study consisted in retrieving HBsAg screening results for both candidate donors and selected donors. The second part was the detection of HBV DNA in HBsAg negative donorsBack to article page