HHS Secretary Kathleen Sebelius announced at a hearing of the House Energy and Commerce Committee that the FDA has approved four H1N1 vaccines in anticipation of the biggest immunization campaign ever in the US. The vaccines are made by Novartis AG, a unit of Sanofi-Aventis SA, CSL Ltd., and MedImmune, an AstraZeneca PLC unit with GlaxoSmithKline PLC being the likely manufacture of the fifth vaccine to be approved. According to CDC director Thomas Frieden, MD, some of the vaccines will be available in three weeks. The US has ordered 195 million doses. Sebelius reassured Congress about the safety of the vaccine. According to the FDA the vaccines have evoked immune responses in most healthy adults eight to ten days after a single dose.
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