This Technical Report on highly pathogenic avian influenza contains the latest information as of October 5, 2023.

2022-23 Flu Season

View national and state-level influenza vaccination coverage estimates for the general population using interactive maps, trend lines, bar charts, and data tables.

2023 Annual News Conference: Preventing Disease This Fall and Winter

Season summary technical report for influenza activity and composition of the influenza vaccine in the United States during the 2022-2023 season

New CDC Study Looks at Flu Severity by Virus Type and Subtype

New Wild to Mild Campaign Drives Key Message to Tame Flu and Reset Expectations

Flu Vaccination Rates Lag Among Health Care Workers in Peru

South America's 2023 Flu Vaccines Cut Risk of Flu Hospitalizations by About Half

Reports of Avian Influenza (AI) "Bird Flu" Outbreaks Increased Globally from 2013-2022

Information for the 2023-2024 Flu Season

CDC Reports Two Human Infections with Flu Viruses From Pigs

CDC Reports Two Human Infections with Swine Flu Viruses

H5N1 Bird Flu Found in Polish Domestic Cats

Influenza Risk Assessment Tool (IRAT)

Virus Descriptions and Report Summaries

Since 2022, despite the wide geographic spread of highly pathogenic avian influenza (HPAI) A(H5N1) viruses in wild birds and to poultry worldwide, with sporadic spillover to mammals, only a small number of sporadic human cases of A(H5N1) have been identified.

2023-2024 CDC Flu Vaccination Recommendations Adopted

CDC Awaits Clinical Specimen from Fatal Variant Flu Case in Brazil

CDC Tracks Ongoing Flu Activity in the Southern Hemisphere