Recall Due to Low Antigen Levels and is Non-Safety-Related

FOR IMMEDIATE RELEASE             Connecticut Department of Public Health

December 23, 2009                                   Contact: William Gerrish

                                                                  (860) 509-7270



The state Department of Public Health (DPH) announced that a second manufacturer of the H1N1 vaccine has voluntarily recalled 4.7 million doses of the vaccine due to low antigen levels.  Connecticut received 67,400 doses of the recalled vaccine and over 300 providers have been affected by the recall.  There is no safety concern with the lots that are being recalled.


MedImmune has voluntarily recalled 4.7 million doses of the nasal spray vaccine due to reduced level of potency.  The vaccine was recalled after the manufacturer, as part of their quality assurance program, found that the antigen content was lower than required potency levels during routine testing.  Before they were shipped, the lots currently being recalled passed all quality controls and met all specifications for safety, purity and potency. 


            “It is important to stress that the vaccine is still considered safe and was recalled for non-safety-related issues,” stated DPH Commissioner Dr. J. Robert Galvin.  “Vaccines still remain our best protection against many diseases, including the flu.  The single, most effective way to protect yourself from the flu is to get vaccinated.”


            The affected lots were shipped to Connecticut between October 7 and October 27.  The slight decrease in vaccine potency is not expected to have an impact on the protective response to vaccination.  The Centers for Disease Control and Prevention (CDC) and Food and Drug Administration (FDA) do not recommend that those who have received the recalled vaccine be revaccinated.  Children 9 years old or younger who received the vaccine should receive a second dose of the vaccine as recommended with all H1N1 vaccines.


DPH has notified all providers who received the vaccine and the manufacturer will also contact the affected providers advising them how to return any unused vaccine.  For more information on the recalled vaccine, please go to


Last week, Sanofi Pasteur recalled nearly 800,000 doses of H1N1 pediatric (0.25 mL, for 6-35 month olds) vaccine in pre-filled syringes.  Connecticut received 7,800 doses of the recalled vaccine from last week’s recall.


For more information on H1N1 flu, please go to


The Connecticut Department of Public Health is the state’s leader in public health policy and advocacy with a mission to protect and promote the health and safety of the people of our state.  To contact the department, please visit its website at or call (860) 509-7270.