From the US Centers for Disease Control and Prevention (US CDC) website:
"The ACIP holds three meetings each year at the Centers for Disease Control and Prevention (CDC) in Atlanta, Georgia to review scientific data and vote on vaccine recommendations. Meetings are open to the public and available online via live webcast. During committee meetings, members present findings and discuss vaccine research and scientific data related to vaccine effectiveness and safety, clinical trial results, and manufacturer's labeling or package insert information. Outbreaks of vaccine-preventable disease or changes in vaccine supply also are reviewed during these meetings. Vaccine recommendations include the age(s) when the vaccine should be given, number of doses needed, dosing interval, and precautions and contraindications to administration of vaccines."