Update: influenza vaccine supply and recommendations for prioritization during the 2005-06 influenza season.

Influenza vaccine distribution delays or vaccine supply shortages have occurred in the United States in three of the last five influenza seasons. In response, prioritization has been implemented in previous years to ensure that enough vaccine is available for those at the highest risk for complications from influenza. The information in this report updates projections of influenza vaccine supply and previous recommendations for priority use of trivalent inactivated influenza vaccine (TIV) during the 2005-06 influenza season.