CDC Seasonal Flu Update and Summary Analysis of H5N1 Bird flu Virus from Louisiana Patient

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Weekly FluView Report, VE for Pediatric Patients with Severe Influenza 2015-2020

December 30, 2024

	Influenza (Flu) 2024 - 2025 Flu Season

www.cdc.gov/flu

Weekly U.S. Influenza Surveillance Report Seasonal flu activity continues to increase across the country. Week 51 reported 1,110 flu A and 22 flu B viruses. Five pediatric flu deaths were reported, totaling nine this season.  Learn More

CDC Analysis of Sequenced HPAI A(H5N1) Virus from Louisiana CDC sequenced the genes of the avian influenza viruses from a patient in Louisiana with bird flu who was very sick from their infection. The viruses were linked to poultry and related to viruses spreading in wild birds. They were different from the viruses causing outbreaks in dairy cows with dozens of mild human infections. Some genetic changes, likely emerging after infection, may help the virus bind more easily to cells in the human upper respiratory tract. Learn More

5-Year Study Finds Seasonal Flu Vaccination Protected Kids from Severe Flu This study found flu vaccine effectiveness in U.S. children was consistently at least 50% against a range of severe outcomes, including emergency department visits, noncritical hospitalizations, and critical hospitalizations. Children who received a flu vaccine were half as likely to have a severe flu-related outcome than children who were not vaccinated against the flu. Learn More

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