The hantavirus has claimed its second victim this week. Another visitor who had visited Yosemite National Park's Curry Village this summer has died after contracting the mysterious virus this summer. So far, there are three confirmed cases of this virus, which has claimed two lives. Another case is being investigated, which could be the fourth confirmed case.

All the cases of the virus are confirmed to be from victims who had stayed in Curry Village in mid-June. It is located at the eastern end of Yosemite Valley and is a collection of tent and cabins. All those who had stayed there around mid-June are being contacted by park officials to check for symptoms of the virus.

Yosemite Park spokesman Scott Gediman told SF Gate: "This is being taken very seriously. We've been able to isolate the cabin area, we've done the thorough cleaning, we're monitoring the area, we're trapping mice and testing them. We're making sure the cabins are shored up. We're being very active, and we have been since thecases came to light."

The hantavirus is carried by mice and can be passed to humans by it's feces and urine. Symptoms of the viral infection are similar to the flu - which include fever, headache and muscle pains. However, the infection could lead to severe problems, which include difficulty breathing that leads to death.

Symptoms turn up between one to six weeks after exposure and there is no cure or treatment for the virus. Two victims died from the rare virus, and one survived. The fourth victim is also expected to survive.

Curry Village consists of 408 tent cabins. Gediman said the park is doing "everything they can to eliminate areas where mice can get into the cabins. This was never because the cabins were dirty, it was never because we didn't take care of them. This is just because approximately 20 percent of all deer mice are infected with hantavirus. And they're here in Yosemite Valley."