What is it? Pneumonic plague is caused by the same bacteria that causes bubonic plague, the Black Death that killed an estimated 25 million people in Europe in the 14th century. Bubonic plague is usually transmitted by flea bites.
How does it develop? Pneumonic plague occurs when the bacteria infects the lungs, or after complications from bubonic plague go untreated.
How does it develop? Pneumonic plague occurs when the bacteria infects the lungs, or after complications from bubonic plague go untreated.
