The U.S. government’s smallpox vaccination program eroded the credibility of federal health officials while leaving no clear indication of how well prepared the nation might be against a bioterrorist attack.So said Dr. Brian Strom, chairman of an Institute of Medicine (IOM) committee which released a report Thursday on lessons learned from the 2002 vaccination effort. The panel presented its findings in Washington, D.C.While stopping short of calling the program a failure, the report did find what appear to be serious shortfalls in how the initiative was implemented. The report, titled The Smallpox Vaccination Program: Public Health in an Age of Terrorism, is the last of seven reports providing recommendations and guidance to the Centers for Disease Control and Prevention (CDC). Unlike earlier reports, however, this one was undertaken at the IOM’s own initiative.