CDC published "Update: Recommendations of the Advisory Committee on Immunization Practices (ACIP) Regarding Use of CSL Seasonal Influenza Vaccine (Afluria) in the United States During 2010-11" in the August 13 issue of MMWR. The first paragraph is reprinted below.

During the 2010 influenza season in Australia, administration of a 2010 Southern Hemisphere seasonal influenza trivalent inactivated vaccine (TIV) (Fluvax Junior and Fluvax) manufactured by CSL Biotherapies was associated with increased frequency of fever and febrile seizures in children aged 6 months through 4 years. Postmarketing surveillance indicated increased reports of fever in children aged 5-8 years after vaccination with Fluvax compared to previous seasons. An antigenically equivalent 2010-11 Northern Hemisphere seasonal influenza TIV (Afluria) manufactured by CSL Biotherapies is approved by the Food and Drug Administration (FDA) for persons aged >=6 months in the United States. Prescribing information for the 2010-11 Afluria formulation includes a warning that "Administration of CSL's Southern Hemisphere influenza vaccine has been associated with increased postmarketing reports of fever and febrile seizures in children predominantly below the age of 5 years as compared to previous years." In the United States, annual influenza vaccination is recommended for all persons aged >=6 months. On August 5, 2010, the Advisory Committee on Immunization Practices (ACIP) recommended that the 2010-11 Afluria vaccine not be administered to children aged 6 months through 8 years. Other age-appropriate, licensed seasonal influenza vaccine formulations should be used for prevention of influenza in these children. If no other age-appropriate, licensed inactivated seasonal influenza vaccine is available for a child aged 5-8 years who has a medical condition that increases their risk for influenza complications, Afluria can be used; however, providers should discuss with the parents or caregivers the benefits and risks of Afluria use before administering this vaccine to children aged 5-8 years.

To access the updated recommendations in full, go to http://www.cdc.gov/mmwr/PDF/wk/mm5931.pdf and see pages 989-992.