Ancient DNA reveals how plague kept returning for 400 years after the Black Death

Billy Odell Tucker-Robinson Founder & Host — Banking With Billy Network • Intelligence Network • Data Science • AI Research • World News
Published: 2026-09-20T12:48:45.754Z • Permanent link

Researchers at the University of Oxford, working in collaboration with the Wellcome Sanger Institute and the University of Cambridge, have made a groundbreaking discovery that sheds new light on the mysterious recurrence of the plague in Europe. For over 400 years, the Black Death, caused by the bacterium Yersinia pestis, had ravaged the continent, leaving deep scars on society and economy. However, according to a study published in the journal Nature, the plague continued to resurface, albeit in a different form, long after the initial outbreak. The team, led by Dr. Laura Salinaro, analyzed ancient DNA samples from plague victims in Europe, dating back to the 14th century.

The study revealed that the plague had evolved into new lineages, adapting to changing environments and human behaviors. These new strains were not only more resilient but also more contagious, spreading rapidly through trade, migration, and war. The researchers identified a specific strain, dubbed "London-1," which was prevalent in England during the 17th century. This strain was found to be more virulent than its predecessors, causing widespread outbreaks in cities like London and Paris. The discovery has significant implications for our understanding of the plague's history and its impact on human societies.

The study's findings are also a testament to the ingenuity of researchers, who developed a novel method to date ancient plague genomes. By analyzing the genetic material of plague victims, the team was able to reconstruct the evolutionary history of the bacterium and identify the specific strains that caused the outbreaks. The researchers used a combination of next-generation sequencing and machine learning algorithms to analyze the ancient DNA samples, producing a detailed timeline of the plague's recurrence. This breakthrough has far-reaching implications for the fields of epidemiology, public health, and microbiology.

The discovery of the plague's recurrence has significant implications for the global economy, particularly in the context of trade and migration. Companies that operate in the pharmaceutical and biotechnology sectors, such as GlaxoSmithKline and Pfizer, may need to reassess their strategies for developing new treatments and vaccines. Researchers in the field of microbiology, such as those at the University of Cambridge, may need to adapt their approaches to address the evolving nature of the plague. The study's findings also have implications for policy makers, who must consider the long-term consequences of climate change and human migration on the spread of infectious diseases.

Furthermore, the discovery has significant implications for the tourism industry, particularly in regions with a history of plague outbreaks, such as the UK and France. Cities like London and Paris may need to develop new strategies for managing the risk of plague outbreaks, including enhanced public health measures and improved waste management practices. The study's findings also have implications for the insurance industry, which may need to reassess its policies for covering plague-related outbreaks.

The discovery of the plague's recurrence is part of a larger pattern of infectious disease outbreaks, which have been on the rise in recent years. The COVID-19 pandemic has highlighted the need for robust public health systems and innovative approaches to disease management. In contrast, the plague's recurrence serves as a reminder of the importance of investing in basic scientific research and the development of new treatments and vaccines. Historically, the plague has been a recurring theme in European history, with outbreaks occurring in the 6th century, the 13th century, and again in the 17th century. The study's findings also have implications for the history of medicine, highlighting the importance of interdisciplinary research and the need for a more nuanced understanding of the complex relationships between humans, animals, and the environment.