BELOIT, Wis. (AP) — Health experts say the flu season in Wisconsin is at its peak and is striking younger patients. Wisconsin influenza surveillance coordinator Thomas Haupt says the state is recording 50 to 70 hospitalizations a week. Haupt says there seems to be fewer total influenza cases this year compared with last season. But he says the difference this year is the age of those with the most serious cases of influenza. Haupt says the two age groups with the most hospitalizations are patients ages 18-to-49 and those 50-to-64. He says last year the over-65 group was the most affected. Rock County Health Officer Karen Cain tells the Beloit Daily News (http://bit.ly/KIstqa ) it's still not too late to get a flu shot, since flu season in Wisconsin can run through March or April.