Influenza vaccines.

The FDA has approved this year's seasonal influenza vaccines. The approved formulation for the U.S. vaccine is identical to that recommended by the World Health Organization, and includes one strain that was used in last year's vaccine and two new strains. The manufacturers approved to market their vaccines in the United States are Chiron Vaccines, Ltd. (Emeryville, CA); GlaxoSmithKline Biologicals (Research Triangle Park, NC); Med-Immune Vaccines, Inc. (Gaithersburg, MD); and Sanofi Pasteur, Inc. (Swiftwater, PA). Approximately 100 million doses of vaccine will be produced by the manufacturers.