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 26: During week 26, influenza diagnoses at local emergency departments and positive detections of influenza A at select local hospital laboratories remained low. Detections for influenza B remained low during week 26, consistent with the past several weeks. Data from all facilities are complete from Week 8 2025 forward. Twenty-nine 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 26 Report: Click here to download the last weekly report of influenza activity (June 22, 2025 through June 28, 2025) in a printable format.

State and National Influenza Surveillance Updates:

Pennsylvania: As of June 28, 2025, the Pennsylvania Department of Health (PADOH) respiratory virus summaries remain paused due to low activity. Activity levels in PA are based on laboratory-confirmed influenza cases. 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 June 28, 2025, the CDC reported that influenza activity remains low. In week 26, clinical laboratories reported 230 (0.8%) of 28,031 specimens tested positive for influenza, 58.3% of which were influenza A. Of influenza A specimens subtyped at public health labs, 100% have been subtyped as H1N1. In week 26, all jurisdictions with sufficient data reported minimal influenza activity. Activity levels were calculated from outpatient data reported to ILINet. For more information, please visit: https://www.cdc.gov/fluview/surveillance/2025-week-26.html.