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 14: Influenza diagnoses at local emergency departments decreased slightly for all ages during week 14. Positive detections of influenza A and B at select local hospital laboratories both decreased in week 14. A preliminary count of 223 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-one 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 31, 2024 through April 6, 2024) in a printable format.

State and National Influenza Surveillance Updates:

Pennsylvania: As of April 6, 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. For more information, please visit: https://www.health.pa.gov/topics/disease/Flu/Pages/2023-24-Flu.aspx

United States:

As of April 6, 2024, the CDC reports that while seasonal influenza activity remains high, activity is decreasing. In week 14, clinical laboratories reported 5,111 specimens (7.7%) of 66,199 specimens tested positive for influenza, 52.7% of which were influenza A. Of influenza A specimens subtyped at public health labs, 43.3% have been subtyped as H1N1 and 56.7% as H3N2. Influenza hospitalizations continue to trend downwards. Three of 10 HHS regions are at or exceeding their outpatient respiratory illness baselines. In week 14, seven jurisdictions reported moderate flu activity while one 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