• Vaccine makers have begun shipping:
    • Live Attenuated Influenza Vaccine (LAIV) nasal spray for H1N1 flu, and
    • 15 microgram pre-filled syringes licensed for use in children age 4 and older
    • Multidose vials for persons 6 months of age and older
  • Some 11 million doses have been shipped to all 50 states as of October 21 (updated weekly). See table of state-by-state shipments.
  • Materials for distribution:

    What You Need to Know PDF (2009 H1N1 Flu Shot Vaccine Information Sheet)

    What You Need to Know PDF (2009 H1N1 LAIV Nasal Spray Vaccine Vaccine Information Sheet)

  • H1N1 flu vaccine development and dosage:
    • Working together with scientists in the public and private sector,  CDC isolated and modified the new H1N1 flu virus so that it can be used to make hundreds of millions of doses of vaccine. Vaccine manufacturers are now producing and shipping the vaccine.
    • On September 15, 2009, the U.S. Food and Drug Administration  approved four vaccines against the 2009 H1N1 flu virus. More information on the 2009 H1N1 flu vaccine.
    • On September 21, 2009, the National Institutes of Health announced that the H1N1 flu vaccine will likely require just one 15-microgram dose for children 10 to 17 years of age. The immune responses in children nine years old and younger were not as strong. Studies show the immune response is very similar to the seasonal flu vaccination. More information on H1N1 flu vaccine trial testing.