Ancient Parchment Reveals Medieval Sheeppox Virus History
Researchers uncover viral DNA in historical manuscripts and livestock remains dating back 3,700 years.
Updated on Oct. 23, 2026 in Life Sciences
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On September 2, 2026, researchers announced the discovery of ancient sheeppox virus DNA within 41 samples of medieval parchment and a 1700 BCE sheep tooth. The study, which analyzed 754 samples, tracks the virus back to its divergence from the capripoxvirus lineage.
Why it matters
Parchment serves as a unique repository for animal DNA and historical pathogens, allowing scientists to reconstruct disease transmission patterns over millennia. Understanding these ancient viral origins helps researchers track how infectious diseases evolved alongside human and livestock migration.
Researchers successfully extracted DNA from medieval parchment by rubbing the surface to collect fine powder for analysis. Genomic testing of 754 samples from Eurasia identified the virus in materials made from cattle and goat hides.
The players
Science Advances
This is a peer-reviewed, open-access scientific journal that publishes significant research findings across various academic disciplines.
The details
The sheeppox virus, which significantly impacts meat and milk production, was identified in specimens spanning 3,700 years. The study suggests the virus diverged from its ancestor approximately 5,200 years ago, coinciding with large-scale sheep movements from the Eurasian steppe.
Timeline
1700 BCE: Researchers dated the oldest identified viral DNA in a Central Asian sheep tooth.
3200 BCE: The sheeppox virus diverged from the capripoxvirus lineage.
3000 BCE: A large-scale movement of sheep occurred from the Eurasian steppe into Europe.
September 2, 2026: Findings were published in Science Advances.
The Big Picture
This study aligns with the human-animal commensal pathogen tracking research program by mapping the deep evolutionary history of livestock diseases. It challenges previous timelines by confirming the virus was circulating in Eurasian sheep populations nearly 4,000 years ago.
By confirming how pathogens were transmitted in early agricultural societies, this research helps scientists better understand the potential for future cross-species disease outbreaks. These insights may eventually aid in the development of more effective agricultural health monitoring and vaccine strategies.
The takeaway
Ancient manuscripts act as biological archives that preserve the history of infectious diseases and their impact on early civilization. Examining these historical records provides a unique look at how human-driven migration has historically shaped the viral landscape.
Further reading
For more information on genetic discoveries, visit our Life Sciences section.
Source note: This article includes information reported by Dongascience.
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