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 39: During week 39, influenza diagnoses at local emergency departments remained low. Detections for influenza A and influenza B at select local hospital laboratories remained low during week 39, consistent with the past several weeks. Data from all facilities are complete from Week 8 2025 forward. Thirty-six 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) during the 2024-2025 season.

Week 39 Report: Click here to download the latest weekly report of influenza activity (September 21, 2025, through September 27, 2025) in a printable format.

State and National Influenza Surveillance Updates:

Pennsylvania: As of September 27, 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: Influenza activity updates from the CDC are last available from week 38 and have been paused at this time. For the latest information, please visit: https://www.cdc.gov/fluview/surveillance/2025-week-38.html.