On Jun. 27, 2023, the U.S. Centers for Disease Control and Prevention (CDC) adopted the 2023-2024 Advisory Committee on Immunization Practices (ACIP) recommendations on annual influenza (flu) vaccination for everyone 6 months and older in the United States.

There were small changes to the annual recommendations around flu vaccination, including an acknowledgement of the updated flu vaccine composition for the 2023-2024 flu season and a change in the recommendations for vaccination of people with egg allergies. Dr. Rochelle Walensky’s adoption of the ACIP recommendations makes them official CDC policy, which will be published in an upcoming Morbidity and Mortality Weekly Recommendation Report later this summer. Providers should begin vaccinating patients according to CDC’s recommended timing, which remains the same as last season.

Flu viruses are constantly changing. The composition of U.S. flu vaccines is reviewed annually by the U.S. Food and Drug Administration Vaccines and Related Biological Products Advisory Committee and updated as needed to best match the flu viruses research indicates will be most common during the upcoming season.