NEWS YOU CAN USE: What’s Going on With Yosemite and Hantavirus? “So far, eight Yosemite visitors are confirmed to have contracted the virus, with three dead of Hantavirus pulmonary syndrome—a variation of Hantavirus that’s not communicable between humans, but which can be transmitted to humans through contact with excrement, saliva, or urine from infected mice. The National Park Service, along with the Centers for Disease Control and Prevention (CDC), are aggressively trying to contact people who recently visited Yosemite and could be at risk.”