Summary:
- The article discusses the ongoing presence of the bubonic plague, also known as the "Black Death," in the western United States, particularly in California.
- It explains that the plague is caused by a bacteria called Yersinia pestis, which can be transmitted to humans through flea bites or contact with infected animals, such as rodents.
- The article highlights the importance of public health efforts to monitor and control the spread of the plague, as well as the need for continued research to better understand and prevent this deadly disease.