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 12: Influenza diagnoses at local emergency departments decreased slightly for all ages during week 12. Positive detections of influenza A and B at select local hospital laboratories both decreased again in week 12. A preliminary count of 136 severe influenza cases (Philadelphia resident, positive by rapid test, PCR or culture, and hospitalized for ≥ 24 hrs) have been reported and confirmed so far this season, the majority of which have been influenza A. Several other influenza reports are pending confirmation of hospitalization. Thirty influenza outbreaks have been reported and confirmed (≥ 1 case of laboratory confirmed flu reported in a long-term care facility) this season.

Current Report: Click here to download the last weekly report of influenza activity (March 17, 2024 through March 23, 2024) in a printable format.

State and National Influenza Surveillance Updates:

Pennsylvania: As of March 23, 2024, the Pennsylvania Department of Health (PADOH) reported that influenza A and B activity both decreased, though activity overall is still high. Emergency department visits resulting in an influenza diagnosis also decreased among all age groups and areas but still remains high. There have been 158,868 influenza positive laboratory tests reported so far this season. Three hundred and seventy three deaths have been reported to date this season, including one pediatric death. For more information, please visit: https://www.health.pa.gov/topics/disease/Flu/Pages/2023-24-Flu.aspx

United States: As of March 23, 2024, the CDC reports that while seasonal influenza activity remains high, activity is decreasing. In week 12, clinical laboratories reported 8,088 specimens (10.5%) of 77,183 specimens tested positive for influenza, 51.1% of which were influenza A. Of influenza A specimens subtyped at public health labs, 44.2% have been subtyped as H1N1 and 55.8% as H3N2. Influenza hospitalizations continue to trend downwards. Six of 10 HHS regions are at or exceeding their outpatient respiratory illness baselines. In week 12, four jurisdictions reported moderate flu activity while nine jurisdictions experienced high levels of flu activity. For more information, please visit: https://www.cdc.gov/flu/weekly/?web=1&wdLOR=c71BAB5AB-9284-416F-B9D9-70F93738A077