Active since 1991, the San Diego Immunization Coalition coordinates vaccine-access campaigns from its Point Loma base through a network of more than 2,000 immunization partners across San Diego County. The coalition's biannual summits and provider training webinars inform the clinical vaccination schedules administered at walk-in sites like AFC Urgent Care Point Loma. County of San Diego Health and Human Services Agency provides in-kind staff and logistical support, giving SDIC direct access to California Immunization Registry data for tracking regional coverage gaps. Educational toolkits developed through the coalition reach federally qualified health centers, WIC programs, school districts, and primary care offices including Sun Health Medical Clinic that administer routine pediatric and adult vaccine series. Countywide outbreak-response coordination—including surge-vaccination planning across 400-plus organizational partners—represents the coalition's highest-complexity operation.