10,000 at Risk of Hantavirus from Yosemite

CDC estimates how many people stayed in tents in park from June to August

A new nationwide advisory issued Friday by the Centers for Disease Control and Prevention said that as many as 10,000 people were at risk for contracting hantavirus after staying in Yosemite National Park this summer.

Park officials said Friday that they had sent letters and emails to about 3,100 people who reserved one of the 91 "signature tent cabins" in the park's popular Curry Village between June 10 and Aug. 24. The CDC alert — issued through its health advisory network, which reaches healthcare providers as well as health departments — said that an estimated 10,000 people stayed in the tents during that time.