(Tribune illustration / March 26, 2012)

The Centers for Disease Control and Prevention no longer considers influenza "widespread" in Illinois.

As of Feb. 16, Illinois is one of 21 states experiencing flu activity in only certain regions, according to CDC data released this morning.

The recent shift in CDC classification signals that Illinois' flu season is winding down after an early, active start.

In Chicago, the health department has estimated the city's flu season peaked in late December or early January.

For the week ending Feb. 16, no one in Chicago was hospitalized with flu-like illness, the first time since early November, according to the latest data from the city's Department of Public Health.

psvitek@tribune.com