The vaccination program, enacted at a cost of $135 million, was plagued by delays and public relations problems. However, Centers for Disease Control vaccination efforts achieved unprecedented distribution results, with more than 40 million Americans immunized between October and December that year. The first vaccinations were given on approximately October 1, the government suspended the immunization program on December 16 after reports of at least 54 cases of Guillain-Barré syndrome across ten states. Approximately 24% of the population had been vaccinated by the time the program was canceled. The suspected pandemic did not spread from Fort Dix and as a result only one person, an Army recruit, died from the flu in 1976. In the very long run, lives may have been saved—a study in 2010 found a significantly enhanced immune response against the 2009 pandemic H1N1 in study participants who had received the 1976 swine flu vaccination.