Chicago Department of Public Health’s respiratory surveillance report for week 1 has been published. Please see the attachment for the full report.

A new Respiratory Illness Dashboard is now available on the CDPH website. This dashboard summarizes information about respiratory virus disease activity in Chicago, with a focus on COVID-19 (caused by the SARS-CoV-2 virus), influenza, and respiratory syncytial virus (RSV). The dashboard will be updated every Friday at 1pm.

Weekly Surveillance Key Points

Overall acute respiratory illness activity level is HIGH across Chicago. Flu and RSV levels are particularly elevated, and COVID-19 continues to increase.
The first pediatric influenza death in Chicago of the 2024-25 season was reported this week.
The percentage of ED visits for flu has more than doubled since last week, surpassing last year’s peak; ICU admissions for flu are also rapidly increasing. ED visits for RSV remain very high, especially among children <5 years, and those for COVID-19 continue to increase modestly across all ages.
The percentage of specimens that tested positive for flu has increased substantially. Almost all (99%) flu specimens that were typed are flu A; among those subtyped, about half (54%) have been H1N1. Test positivity for RSV remains elevated, likely at or near the season’s peak. Test positivity for COVID-19 continues to increase modestly.
Wastewater data is unavailable for week of Dec 22–28, 2024, but during the last week of available data concentrations of flu, RSV, and the COVID-19 virus were all increasing.
Flu and COVID-19 vaccine coverage across the city remain low. There is still time to get vaccinated! Other ways to protect yourself can be found here and here.
For information on the national bird flu outbreak, see: H5 Bird Flu: Current Situation.
Healthcare personnel: please see attached 12/20/24 IDPH SIREN for consideration of enhanced precautions at your facilities including temporary visitor restrictions and broader source control measures (i.e., masking).

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