The preservative thimerosal started Robert F. Kennedy Jr. down the path of questioning vaccine safety. A panel of experts he appointed will no longer recommend annual flu shots that contain it.

The Trump administration’s new vaccine advisers on Thursday endorsed this fall’s flu vaccinations for just about every American — but only if they use certain shots free of an ingredient antivaccine groups have falsely tied to autism.

If the CDC adopts the recommendation, it will mark one of the first major changes in federal vaccine guidance and access as Kennedy embarks on his goal of remaking immunization policy in his image.