H1N1 does have Thimerosal ( a Mercury based preservative) in it...confirmed by the CDC

Oh man this makes me irritated... The below is quoted from the CDC questions and answers page about the H1N1 vaccine...

Does the 2009 H1N1 flu shot have mercury in it?

There is no evidence that thimerosal (a mercury preservative in vaccine that comes in multi-dose vials) is harmful to a pregnant woman or a fetus.

The part in parenthesis answers the question... YES, Thimerosal is in the vaccine, and it is a MERCURY based preservative.

However, because some women are concerned about thimerosal during pregnancy, vaccine companies are making preservative-free seasonal flu vaccine and 2009 H1N1 flu vaccine in single dose syringes for pregnant women and small children. CDC advises pregnant women to get flu shots either with or without thimerosal.

Full Q&A page from CDC