What is human plague?

Plague is a rare, life-threatening, flea-borne zoonosis caused by the bacterium Yersinia pestis. During 2001–2012, the annual number of human plague cases reported in the United States ranged from one to 17 (median = three cases) . read more

Since human plague is rare in most parts of the world, routine vaccination is not needed other than for those at particularly high risk of exposure, nor for people living in areas with enzootic plague, meaning it occurs at regular, predictable rates in populations and specific areas, such as the western United States. read more

While the plague is a serious illness, it can be treated if the symptoms, which vary depending on the type of plague, are recognized early. The plague is typically transmitted to humans through the bites of infected fleas, but can also be transmitted through contact with rodents or dead animals. read more