A resident of northern Arizona has died from pneumonic plague, marking the first fatal case in Coconino County, which includes Flagstaff, since 2007. The individual arrived at Flagstaff Medical Center with symptoms consistent with the plague and died in the emergency room on the same day. Health officials confirmed the infection was caused by Yersinia pestis, the bacterium responsible for the plague. Authorities have emphasized that the risk to the public remains low and that the disease is treatable with appropriate medical care. The Arizona Public Health Association has advised residents that there is no cause for alarm and has provided guidance on protective measures. Officials are investigating the source of the infection amid concerns following the death. This case is the first reported plague death in the United States in 2025.