Illinois Public Health Outbreak Report
Status: Active MonitoringCurrent surveillance data as of November 30, 2025. Sources include IDPH, CDC, and local health departments.
CRITICAL: Pertussis (Whooping Cough) Surge
Illinois is experiencing the highest case counts in over a decade. The outbreak is widespread with significant clusters in Lake County and the Chicago metro area.
*Lake County reported a 4.5x increase in cases compared to the previous year.
Listeria Monocytogenes
Source: Prepared pasta meals (Nate's Fine Foods). Sold at Walmart, Trader Joe's, Kroger.
Recent IL Recalls (Nov '25)
- Prairie Farms Milk Contamination with cleaning fluid. Specific batches distributed to Woodman's stores in IL/WI.
- Silvestri Sweets Undeclared allergens (pecans/wheat) in holiday chocolates.
Respiratory Season Watch
Based on IDPH & CDC acute respiratory illness metrics. "Low" activity does not imply zero risk.
Other Surveillance Notes
Salmonella (Eggs)
The outbreak linked to "Milo's Poultry Farms" and others is declared over as of Nov 20, 2025. 105 cases total.
Measles
Sporadic cases in 2025 (approx. 14 confirmed). Risk remains low for vaccinated individuals.
West Nile Virus
2025 Season totals: 148 human cases, 8 deaths. Mosquito activity has ceased for the winter.