|[Image: Mark Bowler]|
Moreover, because humans have spread the Hepatitis B Virus over the entire globe, research has now demonstrated there is evidence for circulation of the different viruses between different species and sub-species of non-human primates. It signifies the danger of the emergence of newly adapted Hepatitis B Viruses.
 Lanford et al: An infectious clone of woolly monkey hepatitis B virus in Journal of Virology - 2003
 Lyons et al: Species association of hepatitis B virus (HBV) in non-human apes; evidence for recombination between gorilla and chimpanzee variants in PLoS One - 2012