The CDC published (Hanley MN, Altman SM, Phillips A. Notes from the Field: Outbreak of Norovirus Linked to a Food Establishment — Illinois, November 2022. MMWR Morb Mortal Wkly Rep 2023;72:897–898.) on a large Norovirus outbreak resulting from a single restaurant in Illinois. On November 26, 2022, the Tazewell (Illinois) County Health Department (TCHD) contacted the Illinois Department of Public Health (IDPH) concerning a large acute gastroenteritis outbreak linked to a restaurant in Illinois. TCHD conducted an outbreak investigation with the assistance of IDPH, including a case-control study that identified 317 norovirus infections among respondents (excluding the primary patient) who dined at the restaurant during November 19–26, 2022. Overall, 317 case-patients (three with confirmed and 314 with probable norovirus infection) and 40 control patients (persons who dined at the restaurant during November 19–26 and did not become ill) were interviewed. Although the outbreak originated in Tazewell County, ill persons resided in 10 additional Illinois counties and 12 other states. Environmental and epidemiologic investigations indicated that contamination occurred throughout the food preparation process. Preparation with ungloved hands by a food handler who had vomited on November 22, and worked during November 21–23, likely served as a main contributor to the outbreak. The restaurant voluntarily closed on November 26 for disinfection and reopened on November 29 after a health inspection. @ https://www.cdc.gov/mmwr/volumes/72/wr/mm7233a4.htm?s_cid=mm7233a4_w
