The U.S. Food and Drug Administration has approved four vaccines against the 2009 H1N1 influenza virus. The initial lots of the vaccines are expected to become available in a month’s time.
The four vaccines approved are made by CSL Limited, MedImmune LLC, Novartis Vaccines and Diagnostics Limited, and Sanofi Pasteur Inc.
It was only a few days ago that the National Institute of Allergy and Infectious Diseases (NIAID) announced the preliminary data from two vaccine trials involving 2,800 participants above the age of 18. The vaccines were well tolerated, and produced robust immune response in 8-10 days after vaccination. The robust immune response was seen with just one dose of 15 microgram-vaccine.