Back to today’s briefing

Story perspectives

Study Reveals Yersinia Pestis Evolution Fueled Plague Pandemics

6/2/2025

43 3

Summary

Story summary

A groundbreaking study in Science uncovers how genetic changes in Yersinia pestis may have fueled the devastation of two plague pandemics, including the infamous Black Death. By reducing the bacteria's virulence, infected rodents survived longer, unwittingly spreading the disease. Though Y. pestis still poses risks, today's treatments offer a lifeline for those affected.

1 of 1

Story summary

A groundbreaking study in Science uncovers how genetic changes in Yersinia pestis may have fueled the devastation of two plague pandemics, including the infamous Black Death. By reducing the bacteria's virulence, infected rodents survived longer, unwittingly spreading the disease. Though Y. pestis still poses risks, today's treatments offer a lifeline for those affected.