The oldest human virus has been discovered in a 4,500-year old skeleton.
Scientists say the extinct strain of hepatitis B – the potentially lethal liver disease that affects millions – has ‘transformed’ their understanding of the virus.
British scientists said the ‘truly remarkable’ discovery was on a par with finding the first fossils.
Previously the oldest detected human viruses dated back around 450 years.
Scientists took DNA from the skeletons to search for evidence of the Hepatitis B virus