Chicago Department of Public Health’s respiratory surveillance report for the week 46 has been published. Please see the attachment for the full report.

Key Points:

COVID-19:

COVID-19 activity in Chicago is low.
The proportion of emergency department visits attributed to COVID-19 diagnoses remains at <1%.
The test positivity for SARS-CoV-2 has increased from 2.2% to 2.5%.

Influenza:

Influenza activity is low.
One influenza-associated ICU hospitalization was reported for the current surveillance week. Since September 29, 2024, nine influenza-associated ICU hospitalizations have been reported.
21 of 2,137 (1.0%) reported specimens tested for influenza were positive. Since September 29, 2024, 116 of 16,127 (<1%) reported specimens tested for influenza were positive.
The proportion of emergency department visits for influenza-like illness (ILI) is above the local threshold, while the proportion of outpatient visits for ILI is below the local threshold.
The Illinois Department of Public Health has issued Influenza Testing and Reporting Guidance for the 2024-2025 season. Visit the CDPH HAN website for more information on how to report.
For situational awareness of the ongoing outbreak of highly pathogenic avian influenza see, H5 Bird Flu: Current Situation.

Other Respiratory Viruses:

The percent of emergency department visits for RSV in children <5 years has increased from 2.3% to 4.1%.
The test positivity for RSV has increased from 2.5% to 3.3%.
The test positivity for parainfluenza has decreased from 1.1% to 1.0%.
The test positivity for rhinovirus/enterovirus has increased from 14.2% to 17.6%.
The test positivity for adenovirus has increased from 1.5% to 2.3%.

Vaccination:

CDC recommends immunizations as a core prevention strategy to lower the risk from respiratory viruses. Influenza, COVID-19, and RSV vaccines can be given at the same visit if the timing coincides.
Chicagoans should ask their healthcare provider or pharmacist about vaccine availability. For those without a healthcare provider or whose healthcare providers do not have the influenza or COVID-19 vaccine, a schedule of City of Chicago influenza and COVID-19 vaccination clinics is available on the city website and by calling 311.
Influenza vaccine coverage estimates for Chicago residents are now available on the CDPH website.

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