(WISH) - Indiana flu activity is now classified as "widespread," according to the National Centers for Disease Control and Prevention.
The CDC's latest numbers show the flu is on the rise across much of the country.
Thirteen children have died from the flu in the U.S. this season. The CDC said children are particularly vulnerable to H1N1, this season's predominant flu strain.
The agency said about half of the children who died from the flu are otherwise healthy and 80 percent of the children who died last season did not get a flu shot.
The flue season typically goes from October to May.
Health officials said it's not too late for children or adults to get a flu shot.