Some of Europe's most well-known historic manuscripts, including the York Gospels, have proven to be biological time capsules for uncovering the 3,500-year history of the sheeppox virus (SPPV).
An international team of geneticists, historians, virologists, chemists and conservators analyzed DNA from animal skins used to make the parchments of important medieval manuscripts in Europe and detected traces of the sheeppox virus. The parchment that