A person in California recently tested positive for plague, according to El Dorado County health officials. The individual has been treated and is recovering at home.

Plague is a “potentially life-threatening disease” caused by the bacterium Yersinia pestis, according to the U.S. Centers for Disease Control and Prevention. According to the Cleveland Clinic, there are three types of plague: bubonic, septicemic and pneumonic. Each one is named for the part of your body that gets infected.

The disease is thankfully not nearly as fatal as when it sparked the infamous Black Death in England during the 14th century, and can be cured with simple antibiotics.