Indiana Health officials say a severe respiratory illness that has sickened hundreds of children has possibly reached the Hoosier state.
The Indiana State Department of Health reported Monday that laboratory results show three people in northern Indiana recently tested positive for a virus similar to the germ that causes the common cold.
The CDC says the unusually high number of hospitalizations reported now could be "just the tip of the iceberg."
Ten states have contacted the CDC for assistance in investigating clusters of enterovirus.
The CDC says more testing is needed to determine if it's the same enterovirus causing the outbreak confirmed in Missouri and Illinois and suspected in Kentucky, Michigan, Ohio and other states.
Officials say enteroviruses are very common, with 10 to 15 million cases occurring in the U.S. annually.