The Inner Mongolian Chinese city of Bayan has been placed under a level three warning for epidemic control. This is the second-lowest in a four-level system and the hunting and eating of wild animals has been forbidden.
The resident of the Nur is now said to be in a stable condition.
In November 2019 the same area of Inner Mongolia was the scene of an outbreak of pneumonic plague.
Pneumonic plague is a deadlier variant of bubonic plague.
The bubonic plague is caused by the bacteria called yersinia pestis.
This bacteria is usually found in small mammals and their fleas, particularly rats.
Unlike the coronavirus, the disease is caused by an infection of bacteria.
If antibiotics are administered within 24 hours of infection patients likely to survive.
If antibiotics are not available the virus can lead to a prolonged painful death.
The disease results in large swellings in the groin armpits and neck.
The bubonic plague was the disease behind the pandemic known as The Black Death during the Middle Ages.
The Black Death resulted in more than 100 million deaths worldwide.
It has been estimated it reduced the population of Europe by two thirds.
The bubonic plague becomes more deadly when it mutates into the pneumonic plague variant.
The pneumonic plague is the only form of the disease that can be transmitted from person to person.
This happens through respiratory droplets.
These droplets are released through coughing and sneezing.
There is a 30 percent to 60 percent of death from bubonic plague if it is left untreated.
Fatalities from pneumonic plague are even higher.
The fatality rate of untreated pneumonic plague is near 100 percent.
Vaccines for pneumonic plague are being developed, although in most countries they are not yet commercially available.