Is there thimerosal in the H1N1 vaccine?
Thursday, November 5th, 2009
Some H1N1 flu vaccines have a preservative called thimerosal. Although some people have suggested a link between thimerosal and autism, medical experts from the Institutes of Medicine (IOM) have thoroughly researched the issue and concluded that thimerosal-containing vaccines are NOT associated with autism. However, if you’re still concerned, a thimerosal-free version of the H1N1 vaccine is available.
The 2009 H1N1 influenza vaccines that FDA is licensing (approving) will be manufactured in several formulations. Some will come in multi-dose vials and will contain thimerosal as a preservative. Multi-dose vials of seasonal influenza vaccine also contain thimerosal to prevent potential contamination after the vial is opened.
Some vaccine manufacturers will be producing 2009 H1N1 influenza vaccine in single-dose units, which will not require the use of thimerosal as a preservative. In addition, the live-attenuated version of the vaccine, which is administered intranasally (through the nose), is produced in single-units and will not contain thimerosal. The nasal spray version, however, is not recommended for pregnant women.
