Health Information Portal (HIP)

Philadelphia Influenza Surveillance Updates: PDPH tracks influenza activity in Philadelphia, especially severe influenza disease. Providers should report all hospitalized influenza cases, influenza deaths in children, and influenza outbreaks in closed settings like long-term care facilities and shelters.

Week 7: Influenza diagnoses at local emergency departments decreased for all age groups during week 7. Positive detections of influenza A at select local hospital laboratories remained high, but decreased slightly compared to last week. Note that data from one facility are incomplete from Week 1 2025 forward, so counts will likely increase. Detections for Influenza B remained low. Twenty-one influenza outbreaks in long-term care facilities have been reported and confirmed (≥ 1 case of laboratory confirmed flu reported in a long-term care facility) so far this season.

Week 7 Report: Click here to download the last weekly report of influenza activity (February 9, 2025 through February 15, 2025) in a printable format.

State and National Influenza Surveillance Updates:

Pennsylvania: As of February 15, 2025, the Pennsylvania Department of Health (PADOH) reported Influenza A activity is very high but decreased during Week 7. For more information, please visit: https://www.pa.gov/en/agencies/health/diseases-conditions/infectious-disease/respiratory-viruses/respiratory-virus-dashboard.html

United States: As of February 15, 2025, the CDC reported that influenza activity remained high nationally. In week 7, clinical laboratories reported 31,862 (26.9%) of 118,663 specimens tested positive for influenza, 92.0% of which were influenza A. Of influenza A specimens subtyped at public health labs, 62.4% have been subtyped as H1N1 and 37.6% as H3N2. In week 7, 44 jurisdictions reported high to very high levels of influenza activity, including high activity reported in Pennsylvania and very high activity in New Jersey. The remaining 10 jurisdictions with sufficient data reported minimal to moderate activity. Activity levels were calculated from outpatient data reported to ILINet. For more information, please visit: https://www.cdc.gov/fluview/surveillance/2025-week-7.html.