Ancient DNA Traces Plague's 400-Year Persistence Across Europe After Black Death
Researchers have used ancient DNA to reconstruct how plague repeatedly returned to Europe for more than 400 years after the Black Death, providing new insights into how the disease evolved and spread across the continent.
The study analyzed genetic material recovered from archaeological remains, tracing the pathogen's trajectory from its initial catastrophic introduction in the 14th century through subsequent outbreaks. The findings reveal that Yersinia pestis, the bacterium causing plague, did not simply persist in a single reservoir but rather re-emerged in new evolutionary lineages that exploited Europe's interconnected trade networks and population movements.
A key advancement from this research is a new method for dating ancient plague genomes with greater precision. This technique allowed scientists to correlate specific genetic strains with documented historical outbreaks, including those associated with major events like wars and commercial expansion. The ability to pinpoint when particular lineages were active helps historians understand the mechanisms behind Europe's prolonged experience with epidemic disease.
The work demonstrates how integrating paleogenomics with historical records can illuminate patterns invisible to either discipline alone, offering a more complete picture of how infectious diseases shaped—and were shaped by—human society over centuries.