reporter: this is not the firsthan this is not the firss outbreak here. but officials say the number of reported cases could rise. that s putting pressure on scientists to find a cure for this rare but deadly disease. yosemite national park is home to critters that carry potentially deadly diseases. now along with park maps, visitors are getting information about how to avoid the rodent-born illness while health officials look for clues in curry village where the mice were found living in the insulated walls. all but one of the cases originated in tent cabins.
quickly how serious this is but also how rare this is. the cdc report from 93 to 2011 there were 587 cases. you can not get the hantavirus from another person. it comes mostly from rodent droppings. the problem, the virus is deadly. about 30% of the people who get it die. that means if 10 people have it, three of them will die and there is no cure. it attacks the respiratory system very rapidly. at yosemite park this hour they re shutting down and disinfecting tent after tent. they have been doing this for a couple of weeks. what is different now first they thought the virus was limited to one area of the enormous park. now they re saying, no, they will look at tent cabins in many different locations. the world health organization has issued a global alert this week regarding the hantavirus cases in yosemite. they re telling travelers all around the world who come here for this destination point, yosemite, to avoid any exposure to
a third person has died from a rare rodent born illness in california. as many at 10,000 people may have been exposed to the virus while sleeping in tent cabins. five people have fallen ill. the doesn t spread from victim to victim but there s no cure. the park reports it s trying to locate everybody who slept in the cabins so they can take precautions. western intelligence expresses concerns over syria s chemical weapons. we re reported similar stories recently and today the washington post quotes officials from western spy agencies who say the syrian regime has them scatter across the country. the syrian government continues to murder its own citizens.