Colorado Kids In Intensive Care Due to Rare Respiratory Virus

Multiple states around the U.S. ask the CDC for help in battling the virus.
3:04 | 09/07/14

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Transcript for Colorado Kids In Intensive Care Due to Rare Respiratory Virus
We turn to a health energy that has sent kids to the intensive care unit. It's a rare rep pra toir virus. We're going to talk to our Dr. Richard Besser in a minute. Reporter: This morning, it's a mystery respiratory virus. I was having trouble breathing. Reporter: Striking more than 1,000 children across ten states. The onset of symptoms is within hours. Reporter: Doctors believe something called enterovirus 68 could be the culprit. It could go from a cold to being minutes away from death. It's scary. Reporter: It can cause wheezing and is dangerous especially to children with asthma. Hi heart started hurting. My lugs started closing up. Reporter: 13-year-old will said he thought he had a simple cold. He came really close to death. He was unconscious at our house and white as a ghost, blue lips. Reporter: Now recovering at rocky mountain hospital for children in Denver, he's making progress. Doctors have no clue to what is causing the rare virus to spread many the first place. For "Good morning America," Clayton Sandell, ABC news, Denver. So we bring in Dr. Richard Besser. First of all, ten states asking the CDC for assistance. We don't know what for certain this is. Why now? Whey is it happening? It's a common time for outbreaks. Kids come back to school. They like to share things. They bring them home to their little brothers and sisters. And enteroviruses tend to occur in the summer. This one, number 68, is rare. The symptoms can mask that of a common cold. What should parents look for? How dangerous can this be? It can start like a cold. Runny nose, sneezing, coughs. It's the wheezing you have to watch for. In children with asthma in particular it can be dangerous. If a cold goes into difficulty breathing, get help right away. What is the best way to prevent? Prevention, we talk about it, hand-washing is critically important. Good hand-washing. Covering coughs and sneezes. Keep your children home when they're sick so they don't share it. The your child has asthma, make sure they have medicine. If you hear the wheezing, get them to the doctor. And so far, ten states. Look like it's a couple of coastal states, North Carolina and Georgia. What about this spreading more? We talked about this. I talked about it with the CDC. Viruses don't tend to respect borders. It's only ten states now. It will be across the country. If your state doesn't have it now, watch for it. It's coming. Dr. Besser, thank you so much.

This transcript has been automatically generated and may not be 100% accurate.

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