The Center for Disease Control is warning of an unprecedented virus outbreak in California, with two confirmed deaths so far and two more ongoing cases. The virus' ground zero seems to be in Yosemite Park:

The National Park Service (NPS) announced that there were 3 confirmed cases and 1 probable case of Hantavirus Pulmonary Syndrome (HPS) in visitors who stayed at Curry Village in Yosemite National Park since June of this year. Public health officials believe that these visitors may have been exposed to Hantavirus while staying at the Signature Tent Cabins in Curry Village. Two people have died.

The hantavirus pulmonary syndrome—formerly Korean hemorrahgic fever—is a rare but often fatal disease, so the CDC is "advising [these people] to seek immediate medical attention if they exhibit symptoms of HPS." It has an incubation time of two to four weeks in humans before these bone chilling symptoms are manifested in various phases.