Deer mouse tests positive for hantavirus in San Diego park; health officials issue cleaning advisories.

In January 2025, a deer mouse in San Diego's Cuyamaca Rancho State Park tested positive for hantavirus, a rare and potentially fatal disease. Though direct contact between humans and infected rodents is uncommon, exposure can occur when the virus is inhaled from dried rodent waste. There is no cure, so health officials advise using "wet cleaning" methods to clean up rodent droppings, sealing holes in homes, and seeking medical help if exposure is suspected.

2 months ago
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