The Chicago Department of Public Health’s flu surveillance report for the week of March 27, 2022 - April 2, 2022 has been published. Please see the attachment for the full report or view the interactive report on our website.

Expanded respiratory virus data has been added to report!

Key points for the week:

Currently, the risk of influenza infection remains low, however the percent of specimens testing positive for influenza and the number of reported influenza-associated ICU hospitalizations have increased in recent weeks.
Six influenza-associated ICU hospitalizations were reported for the previous week. Since October 3, 2021, 14 influenza-associated ICU hospitalizations have been reported.
166 of 3,033 (5.5%) reported specimens tested for influenza were positive. Since October 3, 2021, 1,426 of 93,811 (1.5%) reported specimens tested for influenza have been positive.
The proportion of emergency department visits and outpatient visits for influenza-like illness (ILI) are below local thresholds.
Clinicians should consider influenza testing in addition to SARS-CoV-2 testing and review guidelines for prescribing anti-viral medications as prophylaxis or empiric treatment.
To protect against influenza infection all Chicagoans six months and older are encouraged to get vaccinated and should ask their healthcare provider or pharmacist about vaccine availability. Influenza and COVID-19 vaccines may be administered on the same day with no waiting between vaccinations required.
For those without a healthcare provider or whose healthcare providers do not have the influenza vaccine, a list of City of Chicago Walk-In Immunization Clinics is available on the city website and by calling 311.
While Chicago is currently in the historical RSV season, the season started unusually early. RSV transmission has now decreased and PCR percent positivity has been <3% since the week ending 12/25/2021.
Highly pathogenic avian influenza (HPAI) A(H5N1) viruses have been detected in U.S. wild birds, commercial poultry, and backyard flocks beginning in January 2022. CDC considers the current risk to the general public’s health in the U.S. to be low. For more information visit the CDC Avian Influenza Current Situation Summary.

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