The U.S. Food and Drug Administration announced today that it has approved four human vaccines against the 2009 H1N1 influenza virus. The vaccines will be distributed nationally after the initial lots become available, which is expected within the next four weeks.

“Today's approval is good news for our nation's response to the 2009 H1N1 influenza virus,” said Commissioner of Food and Drugs Margaret Hamburg. “This vaccine will help protect individuals from serious illness and death from influenza.”

The vaccines are made by CSL Limited, MedImmune LLC, Novartis Vaccines and Diagnostics, and sanofi pasteur.

”The H1N1 vaccines approved today undergo the same rigorous FDA manufacturing oversight, product quality testing and lot release procedures that apply to seasonal influenza vaccines,” said Jesse Goodman, FDA acting chief scientist.

Based on preliminary data from adults participating in multiple clinical studies, the 2009 H1N1 vaccines induce a robust immune response in most healthy adults eight to 10 days after a single dose, as occurs with the seasonal influenza vaccine.  

Clinical studies under way will provide additional information about the optimal dose in children. The recommendations for dosing will be updated if indicated by findings from those studies. The findings are expected in the near future.

As with any medical product, unexpected or rare serious adverse events may occur. The FDA is working closely with governmental and nongovernmental organizations to enhance the capacity for adverse event monitoring, information sharing and analysis during and after the 2009 H1N1 vaccination program. In the U.S. Department of Health and Human Services, these agencies include the Centers for Disease Control and Prevention.

For more information.

Also, see the H1N1 Resource Center on Porkmag.com.

Source: FDA