The mission of the Immunization Services Division (ISD) is to protect individuals and communities from vaccine-preventable diseases by providing federal funds and contracts for the purchase of vaccines, providing technical and financial support to immunization programs, providers and public information, as well as evaluation and research. The IISSB strives to maximize protection against vaccine-preventable diseases by citing the development of Immunization Information Systems (IIS). Immunization information systems help maximize protection against vaccine-preventable diseases by providing accurate data for informed immunization decisions. By facilitating the development, implementation and acceptance of these systems, vaccine providers have the data they need to make the best vaccination decisions. .