Hunting a virus in Yosemite

Instructional placards about deer mice are mounted in the new tent cabins at Camp Curry in the Yosemite Valley. It is believed that deer mice carrying hantavirus burrowed into the wallboard insulation of tent cabins there.   (Mark Boster / Los Angeles Times)

Yellow caution tape warns park visitors to stay away from the construction zone at Camp Curry in Yosemite where the tent cabins are being rebuilt.   (Mark Boster / Los Angeles Times)

A bicyclist cruises past a row of recently rebuilt tent cabins at Camp Curry in the Yosemite Valley.   (Mark Boster / Los Angeles Times)

Visitors walk past the construction zone at Camp Curry in Yosemite, where crews are rebuilding the tent cabins.  (Mark Boster / Los Angeles Times)

Construction and mitigation measures are progressing at the National Park Service staff housing units in Yosemite a year after a deadly hantavirus outbreak.   (Mark Boster / Los Angeles Times)

Carpenter Travis Lawrence installs metal screen underneath an old stairway to prevent rodents from gaining access to one of the National Park Service housing units in Yosemite.  (Mark Boster / Los Angeles Times)

Dan Cornforth, general manager of Camp Curry in Yosemite, looks over some of the rebuilt tent cabins.  (Mark Boster / Los Angeles Times)

Steve Lovejoy installs doors on the new cabins at Camp Curry in the Yosemite Valley.  (Mark Boster / Los Angeles Times)

Work continues on a tent cabin at Camp Curry in the Yosemite Valley.   (Mark Boster / Los Angeles Times)

Dan Cornforth, general manager of Camp Curry in Yosemite, examines the work on the rebuilt tent cabins.   (Mark Boster / Los Angeles Times)

A sign sends a message to visitors at Camp Curry in the Yosemite Valley.   (Mark Boster / Los Angeles Times)