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IDPH adopts CDC recommendations for ‘school outbreak’ definition

Information provided by the Illinois Department of Public Health

SPRINGFIELD, Ill. (October 15, 2021) – The Illinois Department of Public Health (IDPH) is following recommendations from the Centers for Disease Control and Prevention (CDC) to adopt the Council of State and Territorial Epidemiologists’ guidance for PreK-12 school-associated outbreaks.

Previously, CDC recommended that two cases associated with a school would constitute an outbreak. The new national recommendation that Illinois is adopting defines a school outbreak as either (1) multiple cases comprising at least 10% of students, teachers, or staff within a core group or (2) at least three cases within a specified core group. A core group means only those individuals who were together during an exposure period. For example, this could be limited to a classroom, a sports team, before/after school care, performing arts, or other groups and likely does not apply to the entire school population.

More information about school outbreaks, exclusion, guidance, and Frequently Asked Questions can be found on the IDPH website on a new COVID-19 Youth and School Resources page, including youth vaccination rates by county, youth cases over time, and youth emergency department visits: https://dph.illinois.gov/covid19/youth-school.html.

“In an effort to more confidently establish whether transmission of COVID-19 occurred in school versus another location, IDPH is following CDC’s recommendations and adopting Council of State and Territorial Epidemiologists’ guidance, which updates what is considered to be a school-associated outbreak,” said IDPH Director Dr. Ngozi Ezike. “This change in criteria will continue to identify outbreaks and help prevent further spread, but also help rule out outbreaks that are not associated with the school.”

To be considered part of an outbreak in a school, cases must meet the criteria for a probable or confirmed school-associated case with a positive test result, or the start of symptoms within 14 days of each other. These individuals are identified to be close contacts with each other while in the school setting and not another setting outside of school. The cases must also be epidemiologically linked to the school setting or extracurricular activity, meaning they were at the same place at the same time.

Masks continue to be required to be worn in schools by students, staff, and visitors to help protect the health of those in schools and prevent further transmission in the community among vulnerable populations.

Nationwide, counties without masking requirements saw the number of pediatric COVID-19 cases increase nearly twice as quickly during this same period. Masking also helps keep students in school. In Illinois, a student who was within 3-6 feet of a case in a classroom setting is not considered a close contact if both the case and close contact were consistently masked for the entire exposure period.

IDPH recommends vaccination for individuals 12 years and older, including students. School personnel are required to be fully vaccinated or tested at least weekly for COVID-19, per Executive Order.

The Lansing Journal
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