ATLANTA (AP) — U.S. Health Secretary Robert F. Kennedy's new vaccine advisory committee returned to work Thursday, and the panel may vote on proposals about fall flu vaccines and a preservative in some flu shots that antivaccine groups have falsely tied to autism. The Advisory Committee on Immunization Practices, meeting in Atlanta, also is expected to vote on whether to recommend a second version of a lab-made antibody that protects newborns against a childhood menace called respiratory syncytial virus, or RSV. The ACIP, created more than 60 years ago, helps the Centers for Disease Control and Prevention determine who should be vaccinated against a long list of diseases, and when.