Click Here to Read: Plague More Than Five Millennia Ago Sets Back the Date of the Earliest Outbreak The skeletons of nomadic families unearthed in Siberia harbor Yersinia pestis” bacteria, which challenges theories about conditions needed for the disease to spread by Sonja Anderson on the Smithsonian Magazine website on June 18, 2026.
Scanning electron microphotograph depicting a mass of Yersinia pestis bacteria (the cause of bubbonic plague) in the foregutte of the flea vector Credit: Rocky Mountain Laboratories, NIAID, NIH http://www3.niaid.nih.gov/biodefense/Public/Images.htm Public Domain via Wikimedia Commons.

