(Associated Press) Up to 10,000 people who were guests in certain lodging cabins at Yosemite National Park might have been exposed to a deadly mouse-borne virus, park officials confirmed Friday as rangers handled a slew of calls from frightened visitors.

Park concessionaire Delaware North Co. sent letters and emails this week to nearly 3,000 people who reserved the insulated “Signature” cabins between June and August, warning them that they might have been exposed.

The cabins hold up to four people, and park spokesman Scott Gediman said Friday that means up to 7,000 more visitors might have been exposed to the virus that so far has killed two people and sickened four others.

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