1、 Properties of HBV a member of the hepadnavirus group Circular partially double-stranded DNA Viruses Replication involves a reverse transcriptase endemic in the human population and hyperendemic in many parts of the world a number of variants It has not yet been possible to propogate the virus in cell culture1、Properties of HBV • a member of the hepadnavirus group • Circular partially double-stranded DNA viruses • Replication involves a reverse transcriptase. • endemic in the human population and hyperendemic in many parts of the world. • a number of variants • It has not yet been possible to propogate the virus in cell culture