The San Diego Regional Immunization Registry (SDIR) is a collaborative effort of the County of San Diego Health and Human Services Agency Public Health Services Immunization Program and other public and private health care providers, schools, child care and other county programs. The Registry provides an electronic record of all immunizations given to an individual by participating providers in both the public and private sectors. It is a web-based tool that helps doctors with their immunization practice management and increases patient satisfaction by decreasing unnecessary immunizations and decreases vaccine preventable diseases by identifying shots that are needed.