At issue is a flu shot made by CSL Biotherapies, an Australian company. There was an unexplained higher rate of fevers and seizures in children who got the vaccine this spring in those countries.
The Australian company is making vaccine for Americans this fall, but only a small portion of the 170 million doses.
On Thursday, the Advisory Committee on Immunization Practices said doctors should avoid using the Australian vaccine in children under 8, especially in those under 5.
U.S. officials say they have not seen similar problems with other flu vaccines.