Kimberly Ralston, MPH¹, Jennifer Sterling¹, Kathyrn McAuliffe, MPH¹, Michael Peddecord, DrPH², Wendy Wang, MPH¹, Lawrence Friedman, MD³, Karen Waters-Montijo, MPH⁴, C. Robinette Curtis, MD, MPH, FAAP⁵ and Mark Sawyer, MD¹, 1Department of Pediatrics, UCSD, San Diego Immunization Partnership, San Diego, CA, 2Graduate School of Public Health, SDSU, San Diego Immunization Partnership, San Diego, CA, 3University of California, San Diego, 4County of San Diego Health and Human Services Agency, 5NCIRD/ISD/HSREB, CDC, Atlanta, GA