FDA approved these vaccines as a strain change to each manufacturer’s seasonal influenza vaccine. There is considerable experience with seasonal influenza vaccine development and production and influenza vaccines produced by this technology have a long and successful track record of safety and effectiveness in the United States. The Influenza A (H1N1) 2009 Monovalent vaccines will undergo the usual testing and lot release procedures that are in place for seasonal influenza vaccines.

Read HERE (http://www.fda.gov/BiologicsBloodVaccines/Vaccines/ApprovedProducts/ucm181950.htm)

Thanks a lot!