10 SF Bay Area ZIP codes get vaccine priority under new equity plan FacebookTwitterEmail A family walks along one of the streets on Treasure Island in San Francisco, California on Aug. 11, 2020.Douglas Zimmerman/SFGATE California will begin distributing 40% of all vaccine doses to the most vulnerable neighborhoods in the state to inoculate people most at risk from the coronavirus in the latest revamp of the state's rules, the state announced Thursday. Those given priority in the new system live in ZIP codes that fall into the lowest quartile of the state’s Healthy Places Index, which measures socioeconomic opportunity. The areas are considered most vulnerable based on metrics such as household income, education level and access to health care. While race and ethnicity are not explicit factors, the ZIP codes overlap heavily with neighborhoods inhabited by higher populations of Black, Latino and Asian and Pacific Islander residents.