Hundreds of children across the United States have been hospitalized with a strain of an enterovirus known as EV-D68. The first case of this serious respiratory illness has now been confirmed in Montana. Here's what parents need to know.

It's extremely important that parents are educated about this rare, concerning enterovirus. What is this virus? How serious is it? What can be done to prevent it? What symptoms should parents look out for? CNN answers all of these questions.