FDA Approves 2008-2009 Flu Vaccines

The U.S. Food and Drug Administration (FDA) today announced that it has approved this year's seasonal influenza vaccines that include new strains of the virus likely to cause flu in the United States during the 2008-2009 season. This season's vaccines contain three strains of the influenza virus that disease experts expect to be the most likely cause of the flu in the United States. Each season's vaccines are modified to reflect the virus strains most likely to be circulating. The closer the match between the circulating strains and the strains in the vaccines, the better the protection. The FDA changed all three strains for this year's influenza vaccine—an unusual occurrence, as usually only one or two strains are updated from year to year. A list of the strains included in the 2008-2009 vaccine can be found at http://www.fda.gov/cber/flu/flu2008.htm. Of note, two of the three strains recommended for the U.S. this year are now in use for the Southern Hemisphere's 2008 influenza season, which is currently underway. Vaccination remains the cornerstone of preventing influenza, a contagious respiratory illness caused by influenza viruses. According to the CDC, every year an average of 5 to 20 percent of the U.S. population gets the flu, more than 200,000 are hospitalized from flu complications and there are about 36,000 flu-related deaths. Some individuals—the elderly, young children, and people with chronic medical conditions —are at higher risk for flu-related complications. Vaccination of these groups and of health care personnel is critical.