A co-worker of mine says we are supposed to give infants preservative-free influenza vaccine. Is this true?

No. CDC and ACIP express no preference for preservative-free vaccine for infants or any other group of vaccine recipients.

No scientific evidence exists that thimerosal in vaccines is a cause of adverse events unless the patient has a systemic allergy to thimerosal. However, some states have enacted legislation that restricts the use of thimerosal-containing vaccines. Check with your state immunization program to see if your state is one of them (www.immunize.org/official-guidance/state-policies/state-resources/)