Placer County among leaders in vaccines administered per 100,000 residents Placer County is one of the leading counties in the state giving out the most doses per 100,000 residents with about 74,078 doses administered. Author: Zach Fuentes (ABC10) Updated: 8:35 PM PST February 13, 2021 PLACER COUNTY, Calif. — Vaccination rollout has been a struggle across California. Though no area has had it easy, some Northern California counties have seen some success with their distribution. Placer County has given 74,078. The number may seem small compared to the statewide distribution amount, but it is significant. Placer County is one of the state's leading counties, giving out the most doses per 100,000 residents.