The disease has been around for centuries and is responsible for the deadliest pandemic in human history. An estimated 50 million people in Europe died during the Black Death pandemic of the Middle Ages.
JCPH warns the public that it can infect both humans and animals if proper precautions are not taken.
The disease can be transmitted from flea bites and infected animals. While modern antibiotics can prevent complications and death if treated quickly enough, it's still a major threat to both humans and animals.
The disease can cause painful, swollen lymph nodes. Fever, chills and coughing are also symptoms humans can experience.
The plague has recently made a comeback, and the World Health Organization has categorized it as a re-emerging disease. There are approximately 1,000 to 2,000 cases every year, but that is likely a modest figure as there are a number of unreported cases, according to the WHO.
The United States reports up to a few dozen cases every year, according to the Centers for Disease Control. Two people died in Colorado from the plague in 2015.
If left untreated, the bubonic plague can turn into the pneumonic plague, which can cause pneumonia after bacteria spreads to the lungs.