redletterdave writes: "In response to a recent outbreak of a deadly pulmonary disease commonly carried by mice and other rodents, Yosemite National Park has doubled the scope of those likely infected by hantavirus. Given the rising number of confirmed cases (currently eight) and deaths (three), U.S. officials have effectively sounded a worldwide alert for more than 22,000 local and international visitors that may have been exposed to the deadly virus. Health officials initially believed as many as 10,000 people were at risk to contracting the hantavirus after staying in Yosemite's popular Curry Village lodging area between the months of June and August.; unfortunately, that 10,000 "at risk" estimate was low. Officials expanded the warning this week to an additional 12,000 visitors to Yosemite's High Sierra camps, now that the eighth case of hantavirus was confirmed in a man who stayed in those camp areas. Furthermore, more than 2,500 of those individuals currently live outside the United States."