In Illinois, there have been no deaths related to the cyclospora outbreak, the Illinois Department of Public Health confirmed Monday. “While no single source has been identified for all cases, a number of people reporting illness in Illinois said they had consumed shredded lettuce while dining out,” according to an IDPH statement.

State and local health officials have still not identified a cause or source behind the higher number of cyclosporiasis cases the state and the city is seeing compared to previous years. The disease, which can cause frequent and watery diarrhea, is spread by consuming contaminated food or water.

An outbreak of a diarrhea-causing parasitic infection has hit more than half of U.S. states, including in Illinois, which has 194 confirmed and probable cases as of Monday.

It's the weekend for love, but Valentine's Day can leave some feeling awfully lonely. A University of Chicago neuroscientist joins “Chicago Tonight” to discuss the science of loneliness and its potential health hazards.   

Chicago Teachers Union President Karen Lewis is back at work and talking to Chicago Tonight about her recovery, the mayoral race, and the controversial PARCC testing.

The Centers for Disease Control says there may be as many as 48 million cases of foodborne illnesses every year in the United States, costing the economy more than $150 billion and resulting in around 3,000 deaths. We talk with two food safety experts about the impact new technologies are having in keeping our food safe. Read an article.

Multiple news outlets are reporting that Congressman Jesse Jackson Jr. is being treated for a "mood disorder." This, after NBC News reported that he is being treated for alcoholism, a claim his office denies. We have reaction.