Public Health is investigating a case of hantavirus in an adult resident of southeast King County. Hantavirus can cause a rare but deadly disease called Hantavirus Pulmonary Syndrome (HPS). Although we are not aware of an increased risk for hantavirus exposure in King County, it is important that people are aware of the risk and symptoms to watch for and know how to identify and properly respond to rodent infestations. There is no vaccine or specific treatment for HPS, so minimizing exposures to rodents and their nests is key.