Centers for Disease Control and Prevention (CDC) expanded their hantavirus warning to include more than 230,000 visitors who stayed at Yosemite National Park tent cabins this summer. (The previous warning was for 22,000 visitors.) As of Sept. 13, there have been eight case of the hantavirus pulmonary syndrome, a deadly mouse-borne disease. Five of the infected people are from California.
Three of these cases were fatal; all deaths were males from northern California, Pennsylvania or West Virginia. The latest death in late August was confirmed on Sept. 7.
The type of hantavirus in the country is not believed to be transmissible from human to human. Symptoms of the virus—which include fatigue, fever, muscle aches, nausea, vomiting, diarrhea and abdominal pain—manifest between one to five weeks after contact, according to the CDC.
About 35 percent of the people who get the virus will die from it. There is no known cure for hantavirus, which was discovered in the U.S. in 1993. There have bee 602 reported cases, 216 of which resulted in death. This year, there have been 32 reported cases of the virus in San Diego County, according to the county’s Environmental Health department.