Up to 10,000 people who stayed in lodging cabins at Yosemite National Park in California may have been exposed to a deadly mouse-borne virus that has killed two people.
Park concessionaire Delaware North 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 that could mean up to 7,000 more visitors may have been exposed to the virus that so far has killed two people and made four others ill.
Meanwhile, more than 1,000 calls a day are coming into the national park as visitors frightened about the growing outbreak hantavirus pulmonary syndrome call seeking answers.
More top news
It will be rather cloudy to start, with the odd shower for some.
A Royal Navy destroyer is heading to the Persian Gulf to help fight Islamic State (IS), the defence secretary has announced.
Scientists are a step closer to developing a test for early diagnosis of Parkinson's disease.