Yosemite warns of deadly virus linked to rodents

In Yosemite National Park where a deadly outbreak of a rare virus related to rodents has claimed three lives and sickened five others. Health officials have issued a worldwide alert and say as many as 29,000 others may have been exposed.

Exposure to the incurable hantavirus occurred at the Park where seven of the eight victims slept in their "Signature Tent Cabins" some time after June 10th.

The virus is carried in the droppings and urine of small rodents like deer mice and is caught by either inhaling it, or having direct contact.

Dr. Charles Chiu is an infectious disease expert at the University of California, San Francisco and he is Outfront tonight with a breakdown of the rare disease.