Shearer FM, et al. - This study is planned to assess global yellow fever vaccination coverage from 1970 through to 2016 at high spatial resolution and to calculate the number of individuals still requiring vaccination to reach population coverage thresholds for outbreak prevention. As per findings, substantial increases in vaccine coverage have occurred since 1970, however, important gaps are still there in yellow fever vaccination coverage. Results can contribute to improved quantification of outbreak risk, and help to guide planning of future vaccination efforts and emergency stockpiling.