That third victim, from West Virgina, did not stay in the tent cabins at Curry Village.  This report says he visited one or more of the High Sierra camps:  Glenn Aulin, May Lake, Merced Lake, Sunrise and Vogelsang.


From Examiner.com,
Hantavirus Claims Third Yosemite Victim
By: Rick Deutsch

Quote:
Yosemite National Park, CA - September 6, 2012 - A West Virginia man has died of the rodent borne hantavirus. He became the third fatality this summer from this pulmonary disease. The man had stayed in the park's "high-country" in July. He slept at one or more of the famous High Sierra Camps and not the insulated Signature Tent Cabins in Curry Village as other victims have. This fact could increase the risk as many stay in them.

(emphasis added)