Another suspected case has been reported, a 15-year-old boy who must have been in contact with a marmot.
Now has a ban on hunting and eating rodents that it is believed can carry on the dreaded disease. In May last year, two people in Mongolia died of the bully plague after eating raw marmalade meat, the BBC writes.
The disease can be cured with antibiotics, but untreated it has a very high mortality rate. Symptoms include fever, weakness and severe swelling of groin or armpits.
During the Middle Ages, a third of Europe's population is believed to have died in what would later be called the "Plague" or "Digger death", several violent epidemics of bovine plague.